1 00:00:20,199 --> 00:00:28,199 welcome to the Intel fourth generation core series processor AKA code name 2 00:00:25,599 --> 00:00:34,280 Haswell overclocking guide we're going to show you how to get the most of of 3 00:00:30,279 --> 00:00:36,120 your new CPU in only a few simple steps 4 00:00:34,280 --> 00:00:40,600 let's start with the basic benefits of overclocking I actually had someone ask 5 00:00:38,000 --> 00:00:44,039 me about this the other day uh you know what is computer overclocking and I was 6 00:00:42,520 --> 00:00:48,480 trying to explain well you take the parts that you would normally buy and 7 00:00:46,160 --> 00:00:52,000 then you turn them up in speed and you can increase the voltage to make sure 8 00:00:50,039 --> 00:00:55,680 the stability stays right and basically you're getting more performance than 9 00:00:53,480 --> 00:00:58,760 what you actually paid for and this individual said to me oh so it's kind of 10 00:00:57,160 --> 00:01:03,000 like overclocking your phone and I said yes overclock clocking is overclocking 11 00:01:01,000 --> 00:01:07,920 whether it's a PC or a phone the idea is you want more performance and you don't 12 00:01:05,960 --> 00:01:12,640 necessarily want to pay anymore for the actual processor but of course I have to 13 00:01:10,840 --> 00:01:18,280 tell you guys the dangers of overclocking overclocking can result or 14 00:01:15,280 --> 00:01:21,079 will result in higher heat output more 15 00:01:18,280 --> 00:01:26,320 power consumption it can result in instability or shorter lifetime for your 16 00:01:23,560 --> 00:01:30,759 components and very very rarely it can result in outright death of components 17 00:01:29,200 --> 00:01:35,920 but as long as as you're using high quality stuff and going about it in a 18 00:01:33,040 --> 00:01:39,880 safe and responsible manner you likely won't run into this kind of trouble now 19 00:01:38,040 --> 00:01:43,920 the good news is that for CPUs in particular Intel has an overclocking 20 00:01:42,360 --> 00:01:49,520 extended warranty that you can actually buy for it and they'll replace it for you just like that even if you kill it 21 00:01:48,600 --> 00:01:56,200 during overclocking now it would be irresponsible of me also to not give you 22 00:01:53,439 --> 00:02:00,759 guys the luck of the draw disclaimer overclocking is running things outside 23 00:01:58,680 --> 00:02:06,240 of their specifications they are not guaranteed to do these things so if you 24 00:02:03,200 --> 00:02:09,319 happen to get a CPU that runs at exactly 25 00:02:06,240 --> 00:02:11,200 stock speed and only stock speed that's 26 00:02:09,319 --> 00:02:15,360 life you can't return it because it's a bad overclocker it doesn't work that way 27 00:02:13,120 --> 00:02:19,920 it overclocks or it doesn't and that's great if it does so whatever we do today 28 00:02:18,239 --> 00:02:25,080 you might get the same results as us better results than us or much worse 29 00:02:22,360 --> 00:02:33,080 results than us and that'll be just kind of luck of the draw without further 30 00:02:28,760 --> 00:02:35,480 ado let's get into it now planning out 31 00:02:33,080 --> 00:02:39,519 an overclocking capable build does take a little bit more work than just your 32 00:02:37,480 --> 00:02:43,159 average PC you can't Cobble together whatever you want and expect to get 33 00:02:41,120 --> 00:02:46,440 great overclocking performance and it starts with the CPU you're going to 34 00:02:44,879 --> 00:02:50,599 choose either an extreme edition if you're on the very high end or a K 35 00:02:48,920 --> 00:02:55,080 series processor because those are the ones that have what are called unlocked 36 00:02:52,519 --> 00:02:59,360 multipliers allowing you to turn the CPU frequency up and down at will and test 37 00:02:57,920 --> 00:03:05,959 them and actually run them at those speeds now we're using a 4770k this is a 38 00:03:02,959 --> 00:03:08,799 Haswell fourth generation CPU and you 39 00:03:05,959 --> 00:03:14,840 can expect somewhere in the range of 4.4 to 4.5 GHz for most 4770 K and then if 40 00:03:12,959 --> 00:03:20,280 you're lucky and you're in the top 30% you might get around 4.6 in the top 20% 41 00:03:17,760 --> 00:03:26,879 you might get around 4.7 GHz and in the top 10% of CPUs you will be able to get 42 00:03:23,280 --> 00:03:28,680 4.8 GHz or more if you also build a 43 00:03:26,879 --> 00:03:33,200 system around it that is capable of taking advantage of that 44 00:03:31,239 --> 00:03:37,480 now that bit I mentioned before about how it'll increase the thermal output 45 00:03:35,360 --> 00:03:42,879 you need better cooling to get the most out of an overclock so in our case we're 46 00:03:39,640 --> 00:03:46,080 going to be using an Corsair h100i this 47 00:03:42,879 --> 00:03:48,519 is a dual 120 mm radiator liquid cooling 48 00:03:46,080 --> 00:03:53,200 system however it should be noted that you can still get very good overclocking 49 00:03:50,920 --> 00:03:57,599 out of something like a dual Tower heat sink such as this thermal right Silver 50 00:03:55,560 --> 00:04:03,360 Arrow extreme or something like a no TOA NHD 14 for our motherboard we've gone 51 00:04:01,079 --> 00:04:08,200 with the Maximus 6 Extreme from ASUS and as the name suggests this is a bit of an 52 00:04:06,159 --> 00:04:13,439 extreme option and you don't really need that for a mainstream overclock pretty 53 00:04:10,400 --> 00:04:15,959 much any ASUS Z87 board has the same 54 00:04:13,439 --> 00:04:21,799 digital power delivery as well as ufi BIOS optimizations that up to 55 00:04:18,079 --> 00:04:24,000 multipliers such as 48 or 4.8 GHz they 56 00:04:21,799 --> 00:04:28,000 are pretty much all going to be able to achieve those results now the key 57 00:04:26,320 --> 00:04:33,880 difference with high-end boards such as the deluxe WS series tough series or Rog 58 00:04:31,360 --> 00:04:37,800 series is going to be in things like the overall build quality the extras that 59 00:04:35,880 --> 00:04:43,199 are included things like the OC panel that I have in front of me as well as 60 00:04:40,160 --> 00:04:45,520 their beefy vrm Solutions both in terms 61 00:04:43,199 --> 00:04:50,199 of the design and the cooling that allow them to stay stable at even much higher 62 00:04:48,039 --> 00:04:55,120 frequencies than your typical motherboard particularly with the Rog 63 00:04:52,440 --> 00:05:00,400 series you also get a degree of tweaking and tinkering that is not available with 64 00:04:57,840 --> 00:05:06,520 other motherboards for our memory we've gone with Corsair Dominator platinums 65 00:05:02,520 --> 00:05:08,680 these are 2400 MHz modules they're 8 gig 66 00:05:06,520 --> 00:05:12,360 dims meaning we've got 32 gigs of RAM in this system but this was mostly for 67 00:05:10,440 --> 00:05:18,360 stress testing it should be noted that while most Haswell CPUs are capable of 68 00:05:15,039 --> 00:05:20,080 running at 2.8 GHz to 3 GHz on the 69 00:05:18,360 --> 00:05:26,360 memory remember the integrated memory controller affects 70 00:05:21,840 --> 00:05:28,440 this it tends to be reduced a lot as you 71 00:05:26,360 --> 00:05:33,840 increase the CPU speed so once you get up to around 4.6 GHz 1600 MHz is pretty 72 00:05:32,199 --> 00:05:39,639 much a guarantee with anything above that being gravy and most of them can't 73 00:05:36,199 --> 00:05:41,479 do more than around 2133 MHz on RAM once 74 00:05:39,639 --> 00:05:46,319 you ramp up the CPU clock speed this becomes especially true with high 75 00:05:43,639 --> 00:05:51,280 density kits and when you populate all the dims in your motherboard so we use 76 00:05:48,639 --> 00:05:57,759 this kit mostly to push the platform to its absolute limit and because Dominator 77 00:05:53,800 --> 00:06:00,360 platinums are so sexy a good quality 78 00:05:57,759 --> 00:06:03,919 power supply such as the ax 1 1200i although calling it good quality is a 79 00:06:01,919 --> 00:06:08,639 bit of an understatement allows the power that's delivered to your system to 80 00:06:05,800 --> 00:06:12,960 be cleaner and more consistent meaning it will can be more stable in addition 81 00:06:11,280 --> 00:06:16,319 to being able to power more components such if you wanted to add more graphics 82 00:06:14,479 --> 00:06:20,759 cards or whatever else later this particular one is also extremely 83 00:06:17,960 --> 00:06:26,479 efficient rated at 80 plus platinum and is validated for the lower sea states 84 00:06:23,160 --> 00:06:28,800 that has well as capable of going into C 85 00:06:26,479 --> 00:06:33,280 states allow you to save power but they require your power supply to be stable 86 00:06:30,680 --> 00:06:36,960 not only at very high wattages but also incredibly low wattages so make sure 87 00:06:35,639 --> 00:06:43,919 that your power supply whether you're overclocking or not for a Haswell system 88 00:06:39,960 --> 00:06:45,160 is validated for C6 and C7 States now 89 00:06:43,919 --> 00:06:49,639 the rest of these components don't really affect overclocking performance 90 00:06:46,960 --> 00:06:53,960 directly but our Intel 335 series SSD enables us to boot up more quickly after 91 00:06:51,520 --> 00:06:58,240 failed overclocking attempts our Noctua 120 MIM fans allow us to have the 92 00:06:56,400 --> 00:07:03,639 radiator still perform very well but also not be loud and our GTX 780 is a 93 00:07:01,160 --> 00:07:08,840 great match for a 4770k once it's overclocked allowing us to have beastly 94 00:07:06,319 --> 00:07:12,720 system performance now it should also be noted that VGA Hotwire is a feature 95 00:07:11,000 --> 00:07:16,720 supported by certain ASUS motherboards and graphics cards that allows you to 96 00:07:14,520 --> 00:07:20,680 directly overvolt your graphics card using the motherboard so check that out 97 00:07:19,560 --> 00:07:24,960 if you're looking for a great motherboard graphics card pairing as 98 00:07:22,560 --> 00:07:29,759 well and here we go step one of overclocking is to not overclock I 99 00:07:27,960 --> 00:07:35,199 recommend updating your mother board to the latest BIOS setting those settings 100 00:07:32,120 --> 00:07:37,360 all to default make sure all your fans 101 00:07:35,199 --> 00:07:42,520 are spinning make sure your CPU is stable run the Ida 64 built-in CPU 102 00:07:39,960 --> 00:07:48,120 testing tool as well as a couple passes of mest 86 Plus at bone stock settings 103 00:07:45,879 --> 00:07:52,759 because if you have problems before you even start overclocking you're going to 104 00:07:50,159 --> 00:07:56,800 have a bad time as soon as you do start overclocking next up is your software 105 00:07:54,879 --> 00:08:01,720 tool kit so you'll need some kind of application for monitoring the status of 106 00:07:58,759 --> 00:08:06,319 your CPU such as CPU Z or in this case we're using the built-in one in ID to 64 107 00:08:04,599 --> 00:08:11,879 you will need something for stress testing and normally we were using prime 108 00:08:08,759 --> 00:08:14,319 95 in the past but what prime 95 does do 109 00:08:11,879 --> 00:08:18,800 well is it tests maximum heat output of the CPU and there are similar tools such 110 00:08:16,039 --> 00:08:25,919 as Linux or Intel burn test but what the Ida 64 system stability test does well 111 00:08:22,120 --> 00:08:27,840 is it allows the CPU to not only run 112 00:08:25,919 --> 00:08:31,360 really hot but it also tests other components such as the new instruction 113 00:08:29,400 --> 00:08:35,440 sets that are built into Haswell giving us a more complete picture of the 114 00:08:33,279 --> 00:08:39,279 overall system stability last but not least we're going to need some kind of 115 00:08:37,039 --> 00:08:43,320 temperature monitoring program typically in the past I've used real temp GT but 116 00:08:41,360 --> 00:08:46,959 what you might notice about Haswell is that the CPU temperatures under load are 117 00:08:45,480 --> 00:08:53,880 going to be very bouncy they're going to move around a lot it's going to give you Peaks but not necessarily an average so 118 00:08:51,320 --> 00:08:58,040 ASUS has actually built a thermal probe into their motherboards themselves now 119 00:08:56,160 --> 00:09:02,000 that you can read using AI Suite or in our case we're using the OC panel right 120 00:09:00,160 --> 00:09:08,160 here to read it that'll give you a more realistic view of how the CPU is running 121 00:09:04,440 --> 00:09:10,279 under load I always recommend keeping 122 00:09:08,160 --> 00:09:14,120 some other device next to you while you're overclocking such as a notebook 123 00:09:11,959 --> 00:09:18,519 or a tablet so that you can look things up and reference them while you're 124 00:09:16,120 --> 00:09:23,640 working not every board has downloadable profiles like the Rog series boards and 125 00:09:21,160 --> 00:09:27,760 it can be a godsend if you can go on a forum such as Linus tips.com find other 126 00:09:26,440 --> 00:09:31,800 people who have similar Hardware configurations who are able to help help 127 00:09:29,480 --> 00:09:36,560 you and if you can do that at the same time as working on the machine then so 128 00:09:34,320 --> 00:09:41,720 much the better the last thing you need before you get started is this set aside 129 00:09:40,160 --> 00:09:45,560 some time for the overclock budget yourself some time where you assume that 130 00:09:43,959 --> 00:09:50,640 your system is not going to be fully functional because a rushed sloppy 131 00:09:48,360 --> 00:09:55,560 overclock is a bad overclock that can cause instability crashes or even 132 00:09:52,839 --> 00:10:00,440 operating system corruption you don't want to rush it because at the end of 133 00:09:58,079 --> 00:10:03,640 the day if your system crashes and takes with it a bunch of your work or whatever 134 00:10:02,040 --> 00:10:08,680 else it could cost you more time and headache and frustration than if You' 135 00:10:05,600 --> 00:10:10,279 just done it right in the first place 136 00:10:08,680 --> 00:10:15,279 now I know this makes me a little old school because there are lots of software utilities that allow you to do 137 00:10:13,360 --> 00:10:19,560 this kind of stuff within Windows and the extreme motherboard we have here has 138 00:10:17,360 --> 00:10:22,560 the OC panel that allows you to change most of these parameters but not 139 00:10:21,160 --> 00:10:26,519 everyone's going to be working with that so I'm mashing delete or F2 or some 140 00:10:25,040 --> 00:10:31,680 motherboards have different buttons to get into the UEFI or bio that allows us 141 00:10:29,920 --> 00:10:36,480 to change all the settings that we need to change the first setting we'll be 142 00:10:33,640 --> 00:10:41,600 having a look at is the CPU core ratio also known as the CPU multiplier it's 143 00:10:39,680 --> 00:10:46,680 called that because you've got your base clock which is 100 MHz by default and a 144 00:10:44,200 --> 00:10:53,160 multiplier that gives you your final CPU clock speed so if you had a setting of 145 00:10:48,839 --> 00:10:56,079 44 you'd be at 4,400 MHz or 4.4 GHz and 146 00:10:53,160 --> 00:11:00,920 at a setting of 48 you'd be at 4800 MHz or 4.8 GHz now there's 's more to it 147 00:10:59,639 --> 00:11:04,519 than just that and you've got a couple of different options so you press enter 148 00:11:02,880 --> 00:11:09,399 to go into those options and you've got Auto which is your stock speed including 149 00:11:07,360 --> 00:11:14,120 Intel's turbo boost technology which allows you to go to higher speeds when 150 00:11:11,760 --> 00:11:18,440 fewer cores are under load your next setting is sync all cores this allows 151 00:11:16,839 --> 00:11:22,399 you to change that multiplier and it'll change all the cores at the same time 152 00:11:20,399 --> 00:11:27,240 and lock them there so they'll all move together regardless of what kind of load 153 00:11:24,279 --> 00:11:30,959 is on the CPU finally you've got the per core option this allows you to BU build 154 00:11:29,279 --> 00:11:36,240 kind of like your own turbo boost technology but an overclocked one so you 155 00:11:33,000 --> 00:11:38,360 could set a multiplier of maybe 50x when 156 00:11:36,240 --> 00:11:41,800 you're only using one core or 48 when you're using two cores or whatever the 157 00:11:40,320 --> 00:11:46,399 case may be you can play around with it a fair bit the next setting we need is 158 00:11:44,240 --> 00:11:51,519 one of the most important one so we're going to scroll down down down down down 159 00:11:48,959 --> 00:11:57,000 in extreme tweaker here and we're going to get to CPU voltage now we can turn up 160 00:11:55,360 --> 00:11:59,760 the frequency all you want but at the end of the day if you don't increase the 161 00:11:58,560 --> 00:12:03,440 voltage you're not going to increase your stability and the amount of power 162 00:12:01,880 --> 00:12:07,560 you can deliver to the CPU and you're not going to be stable it's not going to 163 00:12:05,279 --> 00:12:12,240 work so CPU voltage allows us to compensate for the increases in 164 00:12:09,279 --> 00:12:16,800 frequency and make the system stable the problem is that the More Voltage you add 165 00:12:14,199 --> 00:12:21,720 to your CPU the more heat output will come out of your CPU so you need to add 166 00:12:18,519 --> 00:12:24,399 more Cooling and it will also decrease 167 00:12:21,720 --> 00:12:28,040 the overall lifespan of your CPU going past a certain point now there are 168 00:12:26,680 --> 00:12:31,680 actually a number of different ways that you can change CP voltage on this 169 00:12:29,720 --> 00:12:36,079 platform so you can see we're in full manual mode right now but I'm going to 170 00:12:33,519 --> 00:12:40,399 change that so now I've got Auto which is self-explanatory manual mode which 171 00:12:38,639 --> 00:12:44,880 allows me to key in a voltage and have it stay there the advantage of this is 172 00:12:43,040 --> 00:12:49,199 that random applications like stress tests can ask for too much voltage and 173 00:12:46,959 --> 00:12:53,199 overpower my cooling solution more on that a little bit later and the 174 00:12:51,079 --> 00:12:57,199 disadvantage is that when the CPUs in a low power state idling at the desktop I 175 00:12:55,639 --> 00:13:01,639 can't take advantage of any of the power savings that Haswell brings to me 176 00:12:59,399 --> 00:13:05,440 next up we've got offset mode so this allows me to take my stock CPU voltage 177 00:13:03,600 --> 00:13:09,760 remember that voltage bounces around a lot depending what's going on to give 178 00:13:07,360 --> 00:13:14,399 you that balance between power and power savings offset voltage takes whatever 179 00:13:11,920 --> 00:13:17,320 your stock ones are and bumps them up a noge so this gives you the power you 180 00:13:16,320 --> 00:13:21,440 need when you're running at an overclocked setting but it doesn't scale 181 00:13:19,680 --> 00:13:25,760 all the way back down when you're idling and not doing anything that's where 182 00:13:23,399 --> 00:13:30,480 adaptive comes in so adaptive is the one I'd recommend using as your daily driver 183 00:13:28,000 --> 00:13:34,440 setting when you're not actually tuning in an overclock because what adaptive 184 00:13:32,639 --> 00:13:39,800 does is it gives you the power you need at full load and scales all the way back 185 00:13:37,120 --> 00:13:43,560 down to stock default voltages when you're not really doing anything the 186 00:13:41,639 --> 00:13:49,600 only drawback of adaptive is that certain stress tests such as Prime 95 187 00:13:46,839 --> 00:13:53,959 can actually override your maximum adaptive voltage that you set and draw 188 00:13:51,639 --> 00:14:00,160 too much power like if you set a voltage of 1.25 for your CPU that that 189 00:13:57,519 --> 00:14:05,040 application could cause up to 1.37 volts to be drawn through your CPU causing 190 00:14:02,160 --> 00:14:09,360 instability or overwhelming your cooling so guys manual mode for dialing in the 191 00:14:07,639 --> 00:14:14,360 overclock then when you're completely done switch over to Adaptive to get that 192 00:14:11,680 --> 00:14:18,759 power savings benefit now on some older platforms it was really recommended to 193 00:14:16,320 --> 00:14:23,759 disable a lot of the power management features such as Intel's lower C States 194 00:14:22,000 --> 00:14:27,560 as well as things like speed step that turns the frequency of the CPU down when 195 00:14:25,639 --> 00:14:31,639 it's not really doing anything on Haswell that hasn't really been found to 196 00:14:29,839 --> 00:14:34,920 affect overclocking in any way so it's great because you get to leave all that 197 00:14:33,040 --> 00:14:40,199 stuff enabled while enjoying better performance under load our next setting 198 00:14:37,199 --> 00:14:43,480 is Dam's frequency 1 two 3 four five six 199 00:14:40,199 --> 00:14:45,360 seven eight yes in there now if we were 200 00:14:43,480 --> 00:14:51,560 going to leave our CPU at default and just set our RAM to 2.4 GHz we could do 201 00:14:48,880 --> 00:14:56,000 that but I recommend like I said before finding your CPU overclock before trying 202 00:14:54,320 --> 00:15:02,320 to turn your RAM up so we're going to dial our RAM into 1600 mahz and leave it 203 00:14:59,399 --> 00:15:07,560 there until we're done testing the CPU for our next trick RAM voltage now RAM 204 00:15:05,240 --> 00:15:12,040 voltage is helpful when overclocking RAM in much the same way that you add more 205 00:15:09,160 --> 00:15:16,519 CPU voltage to overclock your CPU most kits these days with the exception of 206 00:15:13,519 --> 00:15:18,959 low power ones run at around 1.65 volts 207 00:15:16,519 --> 00:15:25,120 but if you're ever not sure look at the side of your memory to find out and I 208 00:15:22,120 --> 00:15:27,600 really don't recommend changing it much 209 00:15:25,120 --> 00:15:32,839 beyond that stock voltage because honestly increasing RAM speeds doesn't 210 00:15:30,240 --> 00:15:36,959 affect many applications that much things like games don't get much benefit 211 00:15:34,600 --> 00:15:40,839 from additional RAM speed on the Haswell platform however there are exceptions to 212 00:15:39,160 --> 00:15:44,720 these rules such as if you run a lot of virtual machines you'll get a big 213 00:15:42,759 --> 00:15:49,319 benefit out of additional RAM speed and you might want to spend more time with 214 00:15:46,399 --> 00:15:53,560 that RAM frequency and that RAM voltage setting pair speaking of virtual 215 00:15:51,839 --> 00:15:57,800 machines there have been previous platforms where it was recommended to 216 00:15:55,600 --> 00:16:02,440 turn off things like virtualization or execute disabl bit not so we go into CPU 217 00:16:01,240 --> 00:16:06,600 configuration where you can see all these settings with Haswell because it 218 00:16:05,399 --> 00:16:11,560 doesn't seem to be affecting overclocking at all which is great because it means you can have all these 219 00:16:09,399 --> 00:16:16,240 features enabled and get more performance changing memory sub timings 220 00:16:14,040 --> 00:16:20,800 can have an effect on overall system stability as well as helping attain 221 00:16:18,160 --> 00:16:24,680 higher RAM overclocks but honestly that's a little bit outside the scope of 222 00:16:22,600 --> 00:16:29,240 this guide one setting in here that you might find really useful though is this 223 00:16:26,680 --> 00:16:33,079 fast boot setting right here disabling fast boot can improve memory 224 00:16:31,079 --> 00:16:37,759 compatibility by giving the computer more time to detect and diagnose any 225 00:16:35,680 --> 00:16:43,519 kinds of issues as it's booting up but it will slow down your boot time now 226 00:16:40,720 --> 00:16:47,319 ASUS has this setting on some auto rules in fact a lot of this stuff is on auto 227 00:16:45,199 --> 00:16:52,519 rules so you shouldn't need to touch most of it but the CPU cache ratio is 228 00:16:50,519 --> 00:16:57,160 something that once you've dialed in an overclock and it's stable you might want 229 00:16:54,680 --> 00:17:01,519 to try turning up because by default as you increase the CPU the CPU cachee 230 00:16:59,440 --> 00:17:06,039 ratio might lag a little bit behind and for Optimal Performance you want them to 231 00:17:03,600 --> 00:17:11,199 be one to one so you might actually go in and turn this up or turn it down to 232 00:17:08,839 --> 00:17:17,439 get it as close to your CPU frequency as possible keeping it 200 to 300 MHz below 233 00:17:14,720 --> 00:17:22,839 your CPU frequency however can improve stability getting near the end here guys 234 00:17:19,799 --> 00:17:24,839 now within the overclocking tuner manual 235 00:17:22,839 --> 00:17:30,200 mode you can see we unlock a few extra settings here CPU strap allows you to 236 00:17:27,360 --> 00:17:36,799 manually set the strap that the base clock runs at so changing this to for 237 00:17:33,000 --> 00:17:39,679 example 125 would allow your CPU's base 238 00:17:36,799 --> 00:17:44,280 clock to become 125 while leaving all the other devices that rely on the base 239 00:17:41,799 --> 00:17:50,160 clock such as the PCI Express frequency to stay at their nominal values this 240 00:17:47,480 --> 00:17:55,120 allows you to make changes to base clock which mostly you don't really need to do 241 00:17:53,679 --> 00:17:59,960 the only time I'd really recommend changing base clock would be to leave 242 00:17:56,960 --> 00:18:01,880 this guy at 100 and and then make slight 243 00:17:59,960 --> 00:18:07,960 changes to the base clock frequency like maybe on the order of of. 3 or 0.5 when 244 00:18:05,840 --> 00:18:12,880 you're at a setting where you kind of look at your overclock and you go oh I'm 245 00:18:09,880 --> 00:18:15,280 almost stable here maybe I want to turn 246 00:18:12,880 --> 00:18:21,280 it down a little bit under 100 so that I can get instead of 4.4 GHz or 4.5 GHz I 247 00:18:19,080 --> 00:18:26,120 can run at 4.43 gahz to see if I can get that 248 00:18:24,080 --> 00:18:29,400 little bit of extra frequency that's how I'd really recommend using these 249 00:18:27,480 --> 00:18:32,960 settings because other than that you don't really need them the last things 250 00:18:31,120 --> 00:18:38,280 I'm going to show you guys are the CPU analog and digital IO voltages so these 251 00:18:35,480 --> 00:18:44,440 are these guys right here now these can improve stability but the challenge is 252 00:18:42,200 --> 00:18:48,600 that they doesn't it doesn't necessarily mean you increase them to get more 253 00:18:46,039 --> 00:18:51,520 stability it's a matter of fine-tuning so if you're looking for that extra 254 00:18:50,080 --> 00:18:54,840 little bit you might try turning them a little bit up or a little bit down to 255 00:18:53,400 --> 00:19:00,520 see if you can squeeze a few more megahertz out of your CPU now on to the 256 00:18:57,559 --> 00:19:05,200 black magic of overclocking itself I always recommend a quick and dirty 257 00:19:03,000 --> 00:19:09,120 overclock to give you some idea of what you're working with before you start to 258 00:19:06,919 --> 00:19:14,280 dial things down so for Haswell I'd recommend a multiplier of 46 on all 259 00:19:12,120 --> 00:19:18,880 cores so we're going to go ahead and change that value there press enter to 260 00:19:16,320 --> 00:19:25,120 dial it in and I would recommend a CPU voltage of 1.2 261 00:19:22,200 --> 00:19:29,480 volts press F10 to save the settings press enter and this will give you some 262 00:19:26,880 --> 00:19:33,280 idea so if it boots up and runs all the benchmarks you need it to and all the 263 00:19:31,200 --> 00:19:39,600 stability tests then you got a pretty good CPU congratulations if it boots up 264 00:19:37,120 --> 00:19:42,760 and doesn't run the stability tests then you've probably got something in the 265 00:19:40,799 --> 00:19:46,440 middle of the road and if it doesn't post at all doesn't get into the 266 00:19:44,360 --> 00:19:50,640 operating system doesn't do anything then that's unfortunate you've probably 267 00:19:48,400 --> 00:19:55,880 got a below average overclocker so this is great our CPU is 268 00:19:53,640 --> 00:20:02,440 running our stability tests no problems at 4.6 that gives us two options now 269 00:19:59,280 --> 00:20:04,440 number one is we can be happy with 4.6 270 00:20:02,440 --> 00:20:09,039 GHz and we can try turning the voltage down to get better power consumption and 271 00:20:06,840 --> 00:20:12,799 less heat output this will make the CPU last for longer even though we're 272 00:20:10,520 --> 00:20:17,679 running a pretty significant overclock option number two is keep pushing so 273 00:20:15,640 --> 00:20:23,120 increase the multiplier and see if she runs at 4.7 GHz with 1.2 volts although 274 00:20:21,080 --> 00:20:27,640 that would mean we'd have a pretty awesome overclocking chip now don't 275 00:20:25,840 --> 00:20:30,880 worry if your system isn't stable at these settings there are other things 276 00:20:29,080 --> 00:20:36,320 you can try you can see we're well within our thermal threshold our Target 277 00:20:32,880 --> 00:20:39,480 of about 85° that keeps us below where 278 00:20:36,320 --> 00:20:41,720 the CPU will throttle but is you know 279 00:20:39,480 --> 00:20:44,679 warm enough that you we're not super thrilled with it good thing we're only 280 00:20:43,360 --> 00:20:51,720 going to be running synthetics for a little while remember real world applications won't have the same heat 281 00:20:49,159 --> 00:20:56,400 effect on the CPU as these synthetic benchmarks do so if it doesn't run you 282 00:20:54,120 --> 00:21:01,880 can try increasing your voltage in steps until it becomes stable check that out 283 00:20:58,840 --> 00:21:04,360 we're stable at 4.7 GHz that means our 284 00:21:01,880 --> 00:21:08,960 CPU is probably somewhere in the top 20% of Haswell 4770k and we're feeling 285 00:21:07,280 --> 00:21:13,840 pretty good about ourselves now we can keep pushing but we know already having 286 00:21:11,600 --> 00:21:18,039 tried this before we started filming that we're not going to get 4.8 GHz 287 00:21:15,960 --> 00:21:23,080 without pushing the voltage up further and we're already sitting at about 80° 288 00:21:20,480 --> 00:21:26,840 underload on the CPU so that's the comfort zone we set for ourselves if we 289 00:21:25,039 --> 00:21:30,880 got more exotic cooling maybe we could go a little bit further but we're 290 00:21:28,480 --> 00:21:35,840 probably gonna stay there what we can do is we can try to optimize our settings 291 00:21:33,960 --> 00:21:40,480 at this particular speed or push for a little bit more but not quite 4.8 GHz 292 00:21:38,880 --> 00:21:44,320 now there are a few more things to do now that you're pretty much finished 293 00:21:42,159 --> 00:21:48,640 number one is turn up your RAM frequency to the rated speed of your memory or go 294 00:21:46,679 --> 00:21:55,039 up in increments until you reach a point where it's not stable anymore we were 295 00:21:50,720 --> 00:21:58,159 able to achieve 1866 even at 4.7 gahz 296 00:21:55,039 --> 00:22:00,279 number two is turn up your cache ratio 297 00:21:58,159 --> 00:22:04,000 so what ASUS will automatically do is turn it down a little bit as you reach 298 00:22:01,880 --> 00:22:07,840 those higher overclocks try bringing it up to one to one you can eek out a 299 00:22:05,640 --> 00:22:11,000 little bit more performance that way and last but not least now that you've got 300 00:22:09,720 --> 00:22:15,159 everything dialed in you're going to want to change to that adaptive vcore 301 00:22:13,520 --> 00:22:20,120 setting which is going to give you that best balance between performance and 302 00:22:17,600 --> 00:22:23,960 power consumption so you're pretty happy with the overclock you've got there's 303 00:22:21,520 --> 00:22:29,000 still a few more things you can do number one is try playing around with 304 00:22:26,320 --> 00:22:35,240 per core overclocking so while with all four cores running at 4.7 GHz this is 305 00:22:32,640 --> 00:22:41,400 the best we can do what if it'll do one core at 4.8 or 4.9 or even 5 GHz you can 306 00:22:39,200 --> 00:22:45,600 try tuning some of those ones a little bit further to see how they go next you 307 00:22:43,559 --> 00:22:50,200 can try increasing the frequency of your memory so go up to the rated speed of 308 00:22:47,640 --> 00:22:54,400 your memory and or or maybe not the rated speed of your memory go up one at 309 00:22:52,000 --> 00:22:58,120 a time until it gets unstable and then back it back off and that's pretty much 310 00:22:56,080 --> 00:23:04,320 where you're good to go we got 1866 6 MHz on our platform even at 4.7 GHz next 311 00:23:02,039 --> 00:23:09,279 you can try turning up your cache ratio to be equal to your CPU multiplier this 312 00:23:07,640 --> 00:23:13,400 will achieve a little bit better performance but not that much the only 313 00:23:11,919 --> 00:23:17,440 thing the only reason we're doing this is we're compensating for ASUS's 314 00:23:15,200 --> 00:23:21,520 automatic rules that turn it down a little bit when you get to higher CPU 315 00:23:19,840 --> 00:23:25,480 frequencies in order to improve stability it is optimal to have them 316 00:23:23,440 --> 00:23:29,400 running one to one and the last thing you do once you have everything dialed 317 00:23:27,320 --> 00:23:35,600 in and you've run your very last stability test is change that voltage 318 00:23:32,440 --> 00:23:37,080 setting from manual to Adaptive mode 319 00:23:35,600 --> 00:23:41,880 that way you get the benefit of the performance and the benefit we ran a few 320 00:23:39,600 --> 00:23:47,039 different games and didn't see huge differences going from our stock 321 00:23:44,120 --> 00:23:53,400 performance CPU to our overclocked CPU at 4.7 GHz however we saw massive 322 00:23:51,320 --> 00:23:58,440 differences in our benchmarks that really made use of all of the cores of 323 00:23:55,520 --> 00:24:02,919 our CPU so the examples were cinebench and szip where our overclocked CPU 324 00:24:00,960 --> 00:24:09,320 performed up to 20 to 25% better than our stock CPU giving you 325 00:24:06,559 --> 00:24:14,880 some idea of what kind of tangible gains can be had in the right applications 326 00:24:12,360 --> 00:24:20,320 with overclocking now if all of that looked like way too much work ASUS has 327 00:24:17,919 --> 00:24:27,600 easy profiles in the BIOS where you can just go CPU level up 4.2 4.4 or 4.6 GHz 328 00:24:25,200 --> 00:24:32,640 and make it that simple on yourself and with within AI Suite there is an autot 329 00:24:30,000 --> 00:24:37,480 tuner that will not just set a static profile but will actually run through 330 00:24:34,960 --> 00:24:41,640 tests with your computer and determine good settings for your individual 331 00:24:39,520 --> 00:24:46,840 components and that one takes anywhere from around half an hour to an hour to 332 00:24:43,600 --> 00:24:49,200 run depending on how long it needs to 333 00:24:46,840 --> 00:24:53,120 find that optimal spot so thank you so much for checking out our overclocking 334 00:24:51,000 --> 00:24:58,159 guide on Intel's fourth generation core series Haswell CPUs on the Z87 platform 335 00:24:56,919 --> 00:25:02,070 don't forget to subscribe subcribe to lus Tech tips for more unboxings reviews 336 00:25:00,640 --> 00:25:11,650 and other computer 337 00:25:12,480 --> 00:25:15,480 videos