WEBVTT

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AMD made a big splash when we got our hands on 3rd gen ryzen and confirmed

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what they already told us that team blue needs to go back to the

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drawing board and while they're there maybe they can unlock all their cpus

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like AMD has on ryzen and while it may still be early days for

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zen 2 let's take a look at how we can make the most of team red's generosity

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since the first generation back in 2017 ryzen hasn't been known for being able

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to clock up much further than what you get out of the box none of our top-end

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chips would go much higher than a couple hundred megahertz at best and many of

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you reported the same of course while this sounds like a raw

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deal for overclockers who happen to be AMD fans it's not all bad news because

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precision boost and xfr helped automatically gain a bit more performance without any tweaking

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required so long as you had a good enough cooler and if you're so inclined

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you can set up AMD's automatic overclocking called precision boost

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overdrive and call it a day you'll get a mild performance boost up to about 200

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megahertz if you're really lucky and dial in the power limits just right but

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in my experience chances are it won't get you very far and the slightly more

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involved method of just entering the BIOS bumping up the voltage and choosing

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a specific multiplier like on Intel likely won't get you a very stable

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system so you'd be forgiven for using precision boost overdrive and just

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calling it a day but that's not why you're here is it let's dive in

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there are some things that make the 3rd gen ryzen overclocking experience

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a little more interesting than previous generations

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the most obvious being the ryzen 9 3900x

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and its multiple dies called ccds like threadripper they communicate with each

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other over the super fast infinity fabric but unlike threadripper the dies

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are physically much closer together for much lower latency and appear as a

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single physical CPU to the operating system for overclocking purposes they

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are separated from each other in other words thanks to the silicon lottery

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chances are you'll end up with one die capable of overclocking much further

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than another which means an all-core overclock becomes a tricky proposition

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one you don't necessarily want if you're after the most performance you can

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muster enter per ccx overclocking a concept that may feel a little familiar

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to x299 platform overclockers using the newest version of ryzen master

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you can visually see which compute complexes each representing clusters of

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three to four cores are the fastest and second fastest on a per ccd basis with

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this information you can target your overclock to be more aggressive on a

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given ccx and this is true even of the single ccd ryzen 5 and 7 processors

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before we get into the nitty gritty on overclocking the chip itself we need to

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talk about memory because it's quite important we've already released a video

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explaining where the sweet spot is for third gen ryzen but to summarize the

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infinity fabric's own separate clock is tied to the memory speed up until around

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1800 megahertz or ddr4 3600 after which

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it automatically decouples to allow for faster memory run if you've got a golden

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chip you can try your luck by bumping up the speed of the infinity fabric to

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match higher speed memory like ddr4 3800 for best possible results overclocking

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the infinity fabric with slower memory may also yield good results depending on

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the scenario but as a rule it's best to keep it one

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to one if possible remember that the actual clock speed of

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ddr memory is half of its published rating because it operates twice per

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cycle memory overclocking in general is fairly universal but there exists a dram

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calculator for ryzen by one usmas that can give you a jumping off point plug in

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your platform details memory type and speed and it'll give you some timings

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based on what it estimates you can get away with in my experience it doesn't work with

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memory faster than 3600 but i've had success using it to help dial in my

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timings there's a variable ocean of jargon and

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acronyms in here but beyond what the calculator gives you here are some

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general tips for high speed memory enable gear down

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mode for better stability and disable power down mode

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as a general rule i'd suggest adjusting your timings in turn rebooting each time

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yeah that's a little tedious but if one of the timings prevents you from booting

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skip it move on and then come back and try a higher value until you're stable

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this is all worth the trouble because this really does matter for

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gaming on ryzen finally some have observed that a high memory frequency

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and infinity fabric frequency can impact your CPU overclocking range so it might

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be worth saving a second profile with your memory clocked down but with

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tighter timings just in case the next important pre-game items are voltages

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which factor heavily into heat output as we alluded to in our review and as

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steve over at gamer's next has discovered with his cold performance test

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keeping temperatures low is imperative for getting better performance out of

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ryzen since most of you won't be chilling your ryzen cpus below ambient

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you'll want to know what voltages you can safely lower before we begin

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tweaking i'd recommend starting out by manually changing every voltage you can

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to its stock value not automatic here are the relevant

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voltages we'll be tweaking today depending on your goals you might be

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able to lower most of these and be okay or you might need to keep them at least

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at stock to keep your oc going it might sound weird because you might think you

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need more voltage for better performance but verizon stability at higher

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frequencies relies heavily on thermal performance

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so the lower you can go the better if you do have to turn them up i'd

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recommend staying within five to ten percent above the stock value to be on

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the safe side many of these voltages are pretty straightforward you've got the memory

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voltage which is typically managed by memory profiles and you'll only really

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want to modify these if you're overclocking your RAM

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you've got the soc voltage that manages the encore consisting of the cache and

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the i o die which can be helpful in overclocking the infinity fabric and

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gaining that last bit of RAM or CPU overclocking stability and of course

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there's the CPU or core voltage which you'd ideally want to top out at 1.35

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volts unless you have a cooler capable of more than 150 watts of heat

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dissipation like a Noctua u12s or a 240

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to 280 millimeter aio yes i know the stock is higher and on

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that note if you're seeing strangely high voltages and monitoring apps like

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hw info it's not your imagination if a

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core is parked which means it is essentially asleep most tools right now

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will only report the last known voltage and frequency before that happened which

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after a benchmark may be very high ryzen master will show you the true state of

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each core it's worth noting at this point that undervolting alone can also slightly

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improve performance due to how precision boost works as long as you don't go too

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low now some voltages are a little less

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straightforward and while many of these are typically derived from other

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voltages tweaking them can result in better

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stability especially if you've modified the voltages they depend on

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for example if you've adjusted the soc voltage then the infinity fabric data

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voltage can be adjusted lower to compensate if you're having trouble with

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memory stability you can adjust the vpp voltage which controls the highest

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voltage used for memory access for higher reliability

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or the vtt voltage which controls the memory's lowest voltage for signal

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integrity most other voltages won't be very relevant to most users and can be

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tweaked down but won't significantly alter the thermals in spite of some of

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the higher voltages you might see listed next let's go over some of the other

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options available to us for overclocking as usual you'll want to increase the

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electrical current capability on your motherboard to get the most out of your

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oc if your motherboard has decent vrms you'll want to do the same for phase

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control and you'll want to set the load line calibration somewhere in the middle

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to start off with i'd recommend adjusting these to less aggressive values if possible after you've dialed

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in your oc to regain some thermal headroom one final setting related to

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phases is the switching frequency higher is typically better but will tax your

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vrms even further so if your oc is just

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a little unstable you can try adjusting these upward to see if it makes a

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difference for you finally send semi skew if present should be enabled for

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overclocking now i've spent all this time explaining everything but

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overclocking the CPU itself but now we're ready to get our hands dirty while

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there's not a lot of fine control afforded by letting precision boost

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overdrive drive for better results we'll still want to

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use ryzen master because at this time per ccx overclocking doesn't appear to

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be an option in the BIOS or at least not on our ASUS or MSI

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motherboards now just because ryzen master shows us the fastest and second

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fastest cores on each ccx doesn't mean we want to overclock on a

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core by core basis because it's actually still the ccx that takes the highest

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given clock and assigns it to each core slower cores will be clocked back down

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to a preset level if you enter a specific value short of your pure ccx

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overclock meaning the user gets no fine control per core even if it seems like

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they do in the software speaking of which your motherboard and even your

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BIOS revision can and will impact your thermals and how far you can overclock

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so it's worth doing a little bit of research before you begin and waiting if

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your BIOS is known to be problematic as far as choosing a frequency to start off

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with though a good jumping off point would be a middle ground between your

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CPU's rated boost and its stock clock

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if it's stable great now you can start cranking each ccx in turn to see where

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they stop for stability's sake i'd recommend 50 to

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100 megahertz below your highest stable clock but that's a matter of taste

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in our case here's what we managed on our 3rd gen ryzen 9 7 and 5 processors

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performance improvements over stock can go as far as 10 or more depending on the

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overclock and the workload although in very light tasks you might actually lose

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some performance because your stock per core boost might for a short while be

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able to go higher than what you can achieve on all cores but if how

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responsive your web browser is were your primary concern you wouldn't really be

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overclocking would you either way you need to be able to keep your CPU cool

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enough for any of this to matter in the first place not to worry though you can curb some of

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that by turning down your voltage and vrm phase settings until you hit a point

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where you're no longer stable and then choose a step or two above that

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point it'll take some trial and error but with enough determination you can

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have your performance per watt cake and eat it too thanks for watching guys if

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this video sucked you know what to do but if it was awesome get subscribed hit

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that like button or check out the link to where to buy some of the stuff we

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featured in the video description also linked in the description is our merch

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store which has cool shirts like this one i think we have this back in stock

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and the hoodie and our community forum which you should

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totally join maybe discuss some of your overclocking

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secrets