DDR5-6000 Memory is the Sweet Spot For AMD Ryzen 7000 Zen 4 CPUs (update)
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Joao Pott
Amazing news for Ryzen users (like me). But I expect the price of good quality kits with 32Gb DDR5-6000 (16Gx2) to drop considerably. Another concern is compatibility in the first few months after release, I had a lot of problems being an early adopter of a Ryzen 1700 at the time of its release... I hope the same torture doesn't happen this time... It's actually one of the reasons that I will wait at least 1 month of reviews before investing in a new PC with the right memory this time, from the beginning (my current one is a 5900X/32Gb 4000Mhz+RTX3080).
Undying
Good as 32gb 6000 cl36 costs around 300eur. Not that bad considering it was double the price not long ago.
Horus-Anhur
This is a huge bump from the 2000mhz in Zen3. Really nice stuff.
Undying
zen3 could not even reach 2000mhz IF.
Horus-Anhur
It could in some very lucky CPUs.
Zeblote
6000 CL36 is not good though. That has worse latency than previous DDR4 kits.
schmidtbag
While this is very good and completely satisfactory for my needs, I would hope that future APUs can get the 1:1 on faster memory, because they're gonna need it.
We really need to stop measuring by CL and start measuring in total latency. Every version of DDR gets significantly worse CAS latency but the total latency tends to improve. DDR5 at 6000MHz and CL36 is better than most options for DDR4, especially if you compare performance : price.
Kool64
A C30 kit is about $100 USD more than a C36 kit. So the question is would a lower latency slower kit be better or should you stick with the C36 if trying to save money?
user1
the zen 3 apus can do <2200mhz
i was able to boot into windows at 2466mhz in 1:1mode with non-suicide voltage on a 5600g (the ram being the limiting factor). i think most of them can do 2400mhz stable with sufficient voltage.
schmidtbag
If you're not depending on an iGPU and are doing dual-channel, I figure spending the extra $100 won't be worth it in real-world workloads. I suspect Zen4 isn't going to be held back as much by memory performance as Zen2, especially if you get a 1:1 gear.
GREGIX
In most cases CL and other primary timings are not so significant to DDR5 overall latency and general performance as secondary and tertiary timings.
Yes, it nice to have 6000+MHz cl32 kit, but it will get destroyed left on xmp by tuned cl40 kit at same frequency.
cucaulay malkin
finally ddr5 will be worth it.
Zeblote
Sure. My current DDR4 kit is 3600 CL14. The best DDR5 I can buy is either 6000 CL30 or 5600 CL28. The "total latency" is almost 30% worse.
This will be a horrible "upgrade", especially in Unreal Engine games that spend lots of time chasing pointers.
Maybe I need to wait another year for good DDR5 to appear...
Kool64
Yeah I actually had that same conclusion when I bought my C18 3600 32gb kit for $100 or so less than the comparable C16.
indeed but then you could theoretically tune the better kit even more for even more speed. Then again these days I personally don't OC stuff like I did back in the day so I'm more of a middle of the road drop in performance type.
schmidtbag
Do you know what total latency means? Because where are you getting 30% worse from?
https://www.eurogamer.net/digitalfoundry-ddr5-vs-ddr4-ram-memory-z690-12900k?page=2
While that chart shows CAS latencies higher than what we're talking about, it still tells a complete story: we're talking a couple nanosecond here and there, which is basically margin of error.
Meanwhile, note the major improvement in read/write performance of DDR5. Even if the total latency was worse (which it pretty much isn't), you would still have overall better memory performance.
cucaulay malkin
but the bandwidth is a lot higher
what is preferred depends on the game really
for example asetto runs great on 5800x3d and likes low latency
https://www.purepc.pl/test-pamieci-ram-ddr5-g-skill-trident-z5-rgb-6000-mhz-cl36-z-procesorem-intel-core-i9-12900k-najszybsza-kombinacja-na-swiecie?page=0,24
cyberpunk prefers more cores and higher bandwidth
https://www.purepc.pl/test-pamieci-ram-ddr5-g-skill-trident-z5-rgb-6000-mhz-cl36-z-procesorem-intel-core-i9-12900k-najszybsza-kombinacja-na-swiecie?page=0,27
mind you 12900k runs even 5200 in 1:2 mode while 3800 ddr4 runs 1:1
6000 or even 5400 in 1:1 will be a game changer let's hope it's true
Joao Pott
I think you may have a point... I'll wait for trusted reviews comparing the latencies of available DDR5 kits to see in the real world what the impact is, especially in games, which is when I need hardware the most these days... for my productivity (streaming production) - Vmix, video editing - Premiere, AF, etc - and Office apps) it doesn't affect me to have high latency memory kit (like cl36) ...
JamesSneed
You will get both with the 7800x3d.
southamptonfc
"Total latency", has increased in every generation of DDR. It hasn't in any way made PCs slower. The greatly increased bandwidth makes up for the worse latency.
Memory speed is less important than GPU or CPU performance. Benchmarks show that if you're running 4K, very fast RAM makes no difference.
Fediuld
Zen3 can do 2000Mhz if you have 4000Mhz ram and you don't try to overclock any lesser ram.(5900X with 4000Mhz ram using atm)
Zen3 found in APUs can do 2500Mhz Infinity Fabric (DDR4-5000 RAM is possible on a 5700G).
Zen3+ (Ryzen 6000) does 2400Mhz Infinity Fabric (DDR5-4800, when we get faster SODDIMs we should know if can be pushed). We don't know the Infinity Fabric speed when LPDDR5-6400Mhz is been used. (is supported).
Zen2 could do 1900-1933Mhz Infinity Fabric (my 3900X used the old 3600C16 kit at 3800C14)
Zen1 could do 1800mhz Infinity Fabric. (my 1800X run with 3600C16 ram on 1:1 since April 2017)
