1 00:00:00,160 --> 00:00:08,400 Have you ever had thermal issues with your computer and thought, 2 00:00:04,600 --> 00:00:10,639 "Wow, if only I could get a bigger fan, 3 00:00:08,400 --> 00:00:18,320 I might be able to put my side panel back on." Well, if that's the case, 4 00:00:14,240 --> 00:00:20,620 we've got the fan for you. And uh this 5 00:00:18,320 --> 00:00:30,800 thing is powerful. 6 00:00:30,800 --> 00:00:38,640 Synergy allows you to share your mouse and keyboard between multiple computers 7 00:00:36,160 --> 00:00:42,960 at once. Check it out now at the link in the video 8 00:00:40,200 --> 00:00:45,680 description. So, this right here is the Delta 9 00:00:45,800 --> 00:00:55,760 PFR912XH. Uh, let's let's call it the blowy matron. And at 10 00:00:51,719 --> 00:00:57,840 $55, it is the most expensive blow I've 11 00:00:55,760 --> 00:01:06,000 ever gotten. I mean, this thing is almost four times the cost of even a 12 00:01:01,840 --> 00:01:09,240 high quality normal consumer fan. So, 13 00:01:06,000 --> 00:01:12,479 can it possibly deliver four times the 14 00:01:09,240 --> 00:01:15,320 performance? Well, funny you should ask. 15 00:01:12,479 --> 00:01:23,119 Try more like seven times the performance. Ramping up to a whopping 11 16 00:01:19,479 --> 00:01:26,720 12,000 rotations per minute. In open 17 00:01:23,119 --> 00:01:31,119 air, Blow Matron can push a staggering 18 00:01:26,720 --> 00:01:34,240 90 L of air every second. But how would 19 00:01:31,119 --> 00:01:37,520 we actually demonstrate what that means 20 00:01:34,240 --> 00:01:40,200 in realworld terms? This thing not only 21 00:01:37,520 --> 00:01:45,840 spins faster than the engine of my Civic, it probably has more torque, too. 22 00:01:43,920 --> 00:01:51,000 If you were to get your finger in this thing, well, to put it lightly, you're 23 00:01:49,360 --> 00:01:56,479 going to have a bad time. Oh, disgusting. 24 00:01:56,479 --> 00:02:00,960 It's only getting on me. 25 00:02:00,960 --> 00:02:06,719 That's what happens when you put your finger in the leaf. Oh, we finally 26 00:02:04,960 --> 00:02:11,360 stopped it. jammed full of carrot. So then with all of that blowing power, we 27 00:02:08,720 --> 00:02:15,520 started to wonder, well, what are the realworld 28 00:02:12,680 --> 00:02:23,560 applications? So here's one. If you're really crunched for space in your case 29 00:02:18,560 --> 00:02:26,560 at 37 mm tall, the super tiny Noctua 30 00:02:23,560 --> 00:02:28,959 NHLi is about as small form factor as 31 00:02:26,560 --> 00:02:34,080 you can get for a heat sink. But of course, that comes with some trade-offs. 32 00:02:31,760 --> 00:02:40,239 mainly that you aren't supposed to use it on a high TDP, that is the thermal 33 00:02:37,040 --> 00:02:42,720 output CPU. But there's the way it 34 00:02:40,239 --> 00:02:48,560 suggests in the manual and then there's the Linus TechTips way. So, can this 35 00:02:45,280 --> 00:02:50,440 heat sink cope with a fully clocked Core 36 00:02:48,560 --> 00:02:55,440 i7 7700K? Well, actually, it's a 37 00:02:53,200 --> 00:03:00,680 surprisingly resilient little bastard and was able to keep our 7700 K running 38 00:02:58,319 --> 00:03:06,480 at full turbo speed under synthetic load. Though, it wasn't exactly 39 00:03:02,959 --> 00:03:08,879 comfortable at a maximum of 97° C. 40 00:03:06,480 --> 00:03:14,400 Fortunately though, our CPU won't have to run hot for long since good old blowy 41 00:03:11,280 --> 00:03:17,440 Matron is coming to the rescue. But how 42 00:03:14,400 --> 00:03:20,080 much of a difference does a seven times 43 00:03:17,440 --> 00:03:25,360 increase in air flow make for real world cooling? Well, Alex here is a great big 44 00:03:23,440 --> 00:03:29,680 cooling nerd. So, the first thing we're going to do is look at it from a 45 00:03:27,040 --> 00:03:36,319 theoretical standpoint. What is it that makes a heat sink remove heat from a 46 00:03:32,680 --> 00:03:38,959 CPU? And why does a bigger, better fan 47 00:03:36,319 --> 00:03:44,480 cool it more? To put it simply, there are three things that affect how much 48 00:03:41,519 --> 00:03:49,680 heat you can remove from your processor. the surface area that is responsible for 49 00:03:46,959 --> 00:03:55,200 cooling, the heat transfer coefficient of the process, and the temperature 50 00:03:52,400 --> 00:03:59,920 difference between the CPU and the surrounding air. Now, it's intuitive 51 00:03:57,680 --> 00:04:03,680 that increasing the amount of air over a heat sink will make it cooler. Think 52 00:04:01,920 --> 00:04:09,280 about putting your hand out of the window of a car. You go faster, you cool 53 00:04:06,400 --> 00:04:13,360 more. But how much can upping the air flow help your cooling? So to figure out 54 00:04:11,439 --> 00:04:17,600 how big of a difference this is going to make, we have to calculate the 55 00:04:15,280 --> 00:04:22,479 convective heat transfer coefficient of air or how much heat air can take away 56 00:04:20,160 --> 00:04:28,960 from an object which is approximately equal to this formula where h is the 57 00:04:26,240 --> 00:04:32,880 heat transfer coefficient and v is the velocity of the air. So, we know the 58 00:04:30,960 --> 00:04:38,560 knock to a fan pushes air at about 1 meter per second. And plopping that into 59 00:04:35,040 --> 00:04:41,919 the formula gives us an h value of 19.5 60 00:04:38,560 --> 00:04:46,160 while blowing matron pushes air at 3.6 61 00:04:41,919 --> 00:04:49,120 m/ second, giving us an h value of 25.8. 62 00:04:46,160 --> 00:04:54,320 But Linus, it's pushing the air 3.6 times faster. Why does it only make a 63 00:04:51,400 --> 00:04:59,759 25% difference to cooling? Well, you see, I was mathing the other day and 64 00:04:57,120 --> 00:05:05,880 this one friaking square root over the velocity kept kicking my ass. You get 65 00:05:02,560 --> 00:05:08,479 diminishing returns the faster the air 66 00:05:05,880 --> 00:05:14,720 moves. So, bringing it back to the real world then, can this be confirmed with 67 00:05:11,440 --> 00:05:18,400 the blowatron? Well, with it strapped to 68 00:05:14,720 --> 00:05:22,320 our NHL 9i under full load and ID of 64, 69 00:05:18,400 --> 00:05:24,000 the CPU maxed out at 73° C, leaving us 70 00:05:22,320 --> 00:05:31,120 lots of room for overclocking. By the way, this also amounted to about 30% 71 00:05:27,840 --> 00:05:35,039 cooler than the stock fan, close to our 72 00:05:31,120 --> 00:05:37,520 expected temperature reduction of 25%. 73 00:05:35,039 --> 00:05:40,919 And really, the LMG thermodynamics and precision pizza heating department 74 00:05:39,039 --> 00:05:46,479 considers anything within an order of magnitude a compelling victory. Of 75 00:05:44,080 --> 00:05:50,240 course, that compromised some of the space savings with our heat sink. 76 00:05:48,479 --> 00:05:54,320 Leading us then to another question. This video really turned into kind of a 77 00:05:51,840 --> 00:06:02,160 voyage of discovery. What's better, having a cooling solution that's 3/4 78 00:05:57,440 --> 00:06:05,280 fins or 3/4 a fan? Well, we tested it 79 00:06:02,160 --> 00:06:08,080 and in this situation, the fan actually 80 00:06:05,280 --> 00:06:12,080 still wins in cooling performance per height. Although it isn't all hunky 81 00:06:10,400 --> 00:06:16,080 dory. Strap one of these guys to your heat sink, you're off to the races with 82 00:06:13,440 --> 00:06:22,160 a chilly CPU. First of all, there is power delivery. That stock knock to a 83 00:06:18,319 --> 00:06:23,919 fan sips 0.14 amps at full load. The 84 00:06:22,160 --> 00:06:26,560 blowy matron on the other hand, well, you probably don't want to attach this 85 00:06:25,360 --> 00:06:31,919 thing to a fan header on your motherboard since it draws a whopping 4 86 00:06:29,039 --> 00:06:36,960 1/2 amps at full load, which is nearly enough to overwhelm this bench power 87 00:06:34,600 --> 00:06:42,160 supply. And of course, there's also the noise. The Noctua fan puts out 24 dB 88 00:06:40,000 --> 00:06:48,800 maximum, which is quieter than someone whispering in a library. Compare that to 89 00:06:44,960 --> 00:06:52,880 the 75 dB of the Delta, which is more 90 00:06:48,800 --> 00:06:52,880 comparable to an alarm clock. 91 00:06:53,440 --> 00:07:00,800 Synergy is a software download that solves the problem once and for all of 92 00:06:58,319 --> 00:07:06,240 having two keyboards and two mice on your desk if you have more than one PC. 93 00:07:03,759 --> 00:07:12,080 It lets you share a single mouse and keyboard between two or even more 94 00:07:09,240 --> 00:07:17,360 computers seamlessly, so you'll no longer get confused about which one is 95 00:07:14,560 --> 00:07:22,080 connected to which. They offer a basic and pro option with a one-time payment 96 00:07:19,919 --> 00:07:26,400 for lifetime access. And the features include uh clipboard sharing between the 97 00:07:24,400 --> 00:07:30,400 computers, dragging and dropping files between the computers, the ability to 98 00:07:28,080 --> 00:07:36,880 set up hotkeys, and more. And the best thing is that Synergy is 99 00:07:33,000 --> 00:07:38,400 crossplatform. Woo! PC, Mac, and Linux. 100 00:07:36,880 --> 00:07:44,400 So, use our link in the video description to get up to 50% off Synergy 101 00:07:42,039 --> 00:07:48,800 today. So, thanks for watching, guys. If you dislike this video, well, you must 102 00:07:46,400 --> 00:07:53,680 be in the like banana protection league or whatever the case may be because we 103 00:07:51,440 --> 00:07:56,080 we ravaged that thing. But if you liked it, hit that like button, get 104 00:07:54,800 --> 00:08:00,560 subscribed, maybe consider checking out where to buy the stuff we featured at the link in the video description. And 105 00:07:59,199 --> 00:08:05,680 also down there, we've got our merch store, which has cool shirts like this one, banana and carrot chunks not 106 00:08:03,680 --> 00:08:09,680 included, as well as our community forum, which you should totally join.