WEBVTT

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he hey everyone it's me the tech tips

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man now that ddr5 has reached insane

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speeds of over 10,000 megga transfers

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per second we've got to know which sticks should you spend your hard-earned

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money on a single kit could cost you anywhere from

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$160 to over

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$400 so making the right choice can be the difference between wallet pain and

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wallet death to help you out we put the screws to 10 kits ranging from stock JX

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speeds all the way up to 7,800 megat transfers per second on both

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Intel and AMD platforms does it matter a

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little does it matter a lot has the lab managed to find the ddr5 price to

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Performance Sweet Spot there's only one way to find out lenoe cloud computing

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credit right now Intel has the only platform where we can test both ddr5 and

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ddr4 on the exact same CPU so that's

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where we started and Intel also had the benefit of being more stable throughout

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our testing we'll get into that a little bit more later for now all you need to

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know is that we took some of the beefiest hardware commercially available

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plugged in some memory kits enabled XMP

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and went to town we're going to have all the gear that we used linked down below

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if you want to check it out for yourself right out of the gate we can clearly see

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that in most games fast ddr4 is still a

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valid option but that price to Performance advantage that it enjoyed in

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the past seems to have pretty much disappeared this is a 3600 megat

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transfer per second kit with pretty tight timings and while it beats our

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ddr5 jck kit by anywhere from 1 to 10

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FPS on average it does so at a considerably higher price and once we're

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spending the same amount on our ddr5 our ddr4 not only loses its Advantage but

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falls measurably behind especially in the all important 1% lows the thing is

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average frame rates are interesting but the difference between 311 and 3155 FPS

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is basically impossible to discern so this bar usually matters a lot more

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because a 10 or even 5 FPS difference is

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much more likely to be noticeable and it also represents how your system will

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perform in the most critical moments when the action is most intense for

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gamers then ddr5 is looking like an obvious choice and and more must be

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better right not necessarily adding our

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7600 and 7800 megat transfer per second

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kits to the graphs I mean yeah they performed admirably but just a few more

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FPS and sometimes less for a hundred

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plus dollars more than our other options what's going on here I mean look at

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these numbers in ID to 64 the more we spend the more memory bandwidth we get

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so our performance should go up proportionally right well here's the

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thing Ida 64's read write and copy

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benchmarks are super useful for uncovering system bottlenecks and

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diagnostic purposes but they are purely

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synthetic that that is to say that they are not representative of any real world

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workload other than copying data directly into or out of memory and not

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every application is actually hungry for more bandwidth for some applications

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latency is actually much more important and that's where our ddr4 kit shines

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with only the fastest ddr5 kits closing the Gap most of the ddr5 kits that we

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tested today hit first word latency figures of 10 NS or faster but our ddr4

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kit managed less than 8 NCS you can

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roughly calculate these values for your own kit by the way just take your

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module's cast latency or how long it takes to complete a clock cycle then

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multiply it by 2,000 and divide by the transfer speed the lower the first word

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latency generally the snappier your memory will be but as evidenced by the

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performance improvements we see with our faster kits it is both this latency and

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transfer speeds that are crucial when it comes to getting the most out of your

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system's memory for applications and gains today look at these two 6,000

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megat transfer per second kits there's a pretty Stark difference in cast timings

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here resulting in a 3.3 nond difference in latency the faster one is a little

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over $20 more for about a 1 to 5 FPS

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Improvement but if we bump up the speed to this 6400 kit with timings that keep

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us at 10 NCS we get more performance but

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start to hit our point of diminishing value returns and then anything past

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this point sees such a stark drop in performance Improvement that it doesn't

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really warrant spending tens or hundreds of extra dollars to try to make the line

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go up at least at current pricing but what about AMD well for team red our

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biggest hurdle was just getting kits faster than 6,400 megat transfers per

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second to even run long story short they

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didn't and that's likely to change anytime soon our testing started mid

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last month so that's December of 2022 and we were running on a GSA version

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1.0.0 do3 patch d right before we filmed

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this Gigabyte dropped a new BIOS for our motherboard that included an update to

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1.0.4 supposedly improving memory support and it does but the difference

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wasn't enough to boot any of our previously incompatible kits I'm certain

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that professional overclockers will be able to use this extra heav room to push

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the platform to new heights but our goal was to measure the outof Box experience

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so we didn't do any tuning Beyond plugging in the CPU plugging in the RAM

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and enabling XMP or Expo as it were the

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good news is that even though it relatively slow our 6400 memory

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absolutely slayed on AMD going from a

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basic ddr5 kit to a premium but still not outlandishly priced kit saw almost

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every game gain 10% average FPS or more

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this is especially notable because these are similar gains to what we saw in

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Intel but we aren't spending as much on our top performing memory since we

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topped out at a lower speed and it's safe to assume that if future BIOS

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updates can get the jello to stop shaking AMD's performance should only

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improve as we get stable access to significantly faster memory

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right well not exactly we are still

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hitting the point of diminishing returns here especially when you consider to the

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price AMD's chips really like tighter

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timings and that seems to be the biggest Factor when it comes to games I mean

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sure the JX spec 4800 cl40 kit is way

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slower than our top end but look at this 5600 cl28 result it's on par or just

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behind its more expensive counterpart and for about $20 less and the reason

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lies here while the transfer speed might be higher on that 6400 kit it actually

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has the same first word latency as the 5600 configuration I mean if you were to

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take that faster kit and sit around for hours tuning the timings chances are

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that you would end up with a better result during our quick sanity check

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with the latest BIOS we found that a jisa 1.0.4 does improve stability at 6,400

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with manually tightened timings but the reality is that many of you don't even

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overclock your CPU these days let alone your memory and realistically your time

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is probably better spent buying our new underwear from LTT Store.com we've got

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new colors available check them out today at least that's true for gaming

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for productivity where we'll have a lot more CPU cores to feed with delicious

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data it's a whole different Beast similar to what we saw with Intel faster

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modules seem to make a huge difference in some workloads and then basically

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none in others handbrake for example sees an impressive boost of

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22% over jde wow but then just about

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everything else see either no improvement a clearly linear progression

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that is so small you might as well save your money or what could best be

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described as run to run variants one major issue to note is that we have more

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productivity results but our 6400 kit didn't manage to finish all of them so

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hence the did not finish results we do expect this to continue to improve over

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time as am5 matures as a platform and new BIOS updates roll out but it was a

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major problem for us at the time of testing and the improvements that were

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available by the time we're actually filming it have been pretty marginal so

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nobody knows exactly what the future will hold and it's still not 100% clear

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where the ddr5 bang for your buck sweet spot is going to ultimately end up I

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mean considering that ddr4 launched in 2014 and higher speed kits took years to

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become the norm it's still early days for this new generation but what is

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clear is that you don't want to buy something with significantly slower

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firstword latency if you can avoid it particularly on the lower transfer speed

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modules oh and also that there is no

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point buying faster than 6,000 or at most 6400 speed memory for AMD at least

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for this generation if you enjoyed this video we haven't tried it with ddr5 yet

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but you might want to check out our just how bad is mixing memory video it's not

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as bad as you might think or at least wasn't