Wednesday, August 10th 2022
Ryzen 7000 Said to Have a DDR5-6000 Memory "Sweet Spot"
If you remember, there were quite a lot of discussions about memory speed "sweet spots" for both the Ryzen 3000- and Ryzen 5000-series, with the user experience not always meeting AMD's sweet spot for memory clocks. Now details of the Ryzen 7000-series memory sweet spot has arrived courtesy of Wccftech and the speed is said to be DDR5-6000. This is 400 MHz higher than the apparent official maximum memory clock speed of DDR5-5600, but as we know, the manufacturer's max memory clock is rarely the actual max. In AMD's case, things obviously work a bit differently, as the Infinity Fabric clock should ideally run at a 1:1 ratio with the memory in the case of the AM4 platform, to deliver best possible system performance and memory latencies.
That said, as we're using DDR memory, the actual clocks are only half of the memory speeds, so the IF clock is operating at no more than 2000 MHz if the memory is DDR4-4000. However, if the same applies to the Ryzen 7000-series, it appears that AMD has managed to bump the IF clocks by a not insignificant 1000 MHz, as the IF fabric would now be operating at up to 3000 MHz. This could see the Ryzen 7000-series offering better memory latencies than Intel's Alder Lake and upcoming Raptor Lake CPUs, as Intel is running DDR5 memory at a 2:1 ratio or a 4:1 ratio. AMD is said to still have a 2:1 ratio as well, but as with the AM4 CPUs, this offers worse overall performance.
Update 11:49 UTC: Yuri Bubliy aka @1usmus has confirmed on Twitter that the max IF frequency of 3000 MHz and it seems like AMD has added a range of new memory and bus related features to the AM5 platform, going by the additional features he posted.
Sources:
Wccftech, @1usmus (1), @1usmus (2)
That said, as we're using DDR memory, the actual clocks are only half of the memory speeds, so the IF clock is operating at no more than 2000 MHz if the memory is DDR4-4000. However, if the same applies to the Ryzen 7000-series, it appears that AMD has managed to bump the IF clocks by a not insignificant 1000 MHz, as the IF fabric would now be operating at up to 3000 MHz. This could see the Ryzen 7000-series offering better memory latencies than Intel's Alder Lake and upcoming Raptor Lake CPUs, as Intel is running DDR5 memory at a 2:1 ratio or a 4:1 ratio. AMD is said to still have a 2:1 ratio as well, but as with the AM4 CPUs, this offers worse overall performance.
Update 11:49 UTC: Yuri Bubliy aka @1usmus has confirmed on Twitter that the max IF frequency of 3000 MHz and it seems like AMD has added a range of new memory and bus related features to the AM5 platform, going by the additional features he posted.
70 Comments on Ryzen 7000 Said to Have a DDR5-6000 Memory "Sweet Spot"
Either that, or AMD redesigned the Infinity Fabric to a wider bus, which I highly doubt is the case as I have not heard of a 4th gen Infinity Fabric design nor have I heard the 3rd gen in the last Epyc's moved up from 16-bit IFIS transfers.
Anyway, many possibility. We need to remember that Zen 2 and Zen 3 had the same I/O die so it's not inconceivable to assume that Zen 4 and Zen 5 could us this very same I/O Dies too.
FCLK = Infinity Fabric, which didn't exist prior to Ryzen in 2017.
There are rumours of possible AM5 MB's with DDR4 support, but we'll see. If lower latency DDR5 5200 is good price why even bother with DDR4.
Of course, their 32GB of 3200Mhz ram is unstable.
I also have low hopes for intels Non K/Z stuff, they LOVE artificial locks
AMD become to a garbage High Price shit, for the price of an 10105F and Board ill get by AMD an Ryzen 3 3100.
AMD can shove theyr CPU and APU up theyr asses, such of a shit hole company it is now.
My last AMD was a 7860K.
I can see this being a big problem for overclockers. I guess you pay for a locked cpu, you get a locked down cpu :)
Edit: now I want to buy a 12th i3 and see what I can do with the locked voltage.
We've been able to limited overclock intels for MANY many years, and then it's gotten strangled... my 2nd through 4th gen locked chips can all max out the RAM speeds (1866/2400 depending on generation) as well as overclock all core load to 200Mhz under turbo.
And then... we get 6th gen boards, locked to 2133, with zero voltage control, no useful power limits, etc.
Overclocking in this context he more meant tweakers - overclocker, underclocker, undervolter, etc.
And its why i've stuck with AMD through Zen despite the early teething troubles, at least I could tweak things... my poor i7 6700 is slower than my i5 2400S, since it cant feed the GPU with the slowass ram
It has always been the case that running 1:1, or divisible by 2 was the best.
tpucdn.com/review/amd-ryzen-5-5600/images/relative-performance-games-1280-720.png
Board supports all these things seperately, just wont enable that support without a K chip