64GB (2X32) 6400MHZ CL32 on Ryzen 9 7900X AGESA 1.0.0.7c

[LethaR]

Hello people. I just bought a kit of some chinese DDR5 ram i've never heard about: KingBank Sharp Blade. BUT the reviews were 5/5, the kit comes with SK Hynix A-Die which seems to be the best for ddr5 oc and they're pretty enough (and white) for my rig (they also cost nearly half any other 64gb ddr5 kit costs here in Spain -> 170€). Problem is, i have a ryzen 9 7900x on a b650-a gaming wifi, BIOS AGESA 1.0.0.7c, which seems to have added support for this kind of weird ram kits and also improve ddr5 stability with high density modules. Should i expect my rig to boot properly with this 2x32gb kit on the EXPO profile settings (which this kit has)? or should i worry? maybe going to 6000cl30 or something like that?

 

[ir_cow]

6400 for AMD is a tough one. You have a few potential hurdles. The big one is most motherboards will run in a 2:1 ratio to the memory controller. If so, you would than have to manually enforce 1:1 in the advanced BIOS. Otherwise, If you leave at 2:1, performance is lower than 4800. The latency penalty is massive.

Second one is dual-rank at that speed in 1:1 is probably not going to work without some manual voltage adjustments.

You already bought it. Worst that happens is exactly as I mentioned above.

You can also enable XMP/EXPO and change the freq to 6000 manually too.

 

[LethaR]

6400 for AMD is a tough one. You have a few potential hurdles. The big one is most motherboards will run in a 2:1 ratio to the memory controller. If so, you would than have to manually enforce 1:1 in the advanced BIOS. Otherwise, If you leave at 2:1, performance is lower than 4800. The latency penalty is massive.

Second one is dual-rank at that speed in 1:1 is probably not going to work without some manual voltage adjustments.

You already bought it. Worst that happens is exactly as I mentioned above.

You can also enable XMP/EXPO and change the freq to 6000 manually too.

yeah thats basically what i'm going to do. Probably 6000cl30 with some tight subtimings is going to give me more performance than 6400 stock timings even if it didnt run at 2:1 ratio. As i said, being hynix a-die, getting some low timings should be fairly "easy". Thing is, most ryzen 7000 with those recent AGESAs should be expected to hit 6000 at 1:1 ratio even with 2x32 sticks right? i know its not 100% guaranteed but... you know, almost.

 

[evernessince]

yeah thats basically what i'm going to do. Probably 6000cl30 with some tight subtimings is going to give me more performance than 6400 stock timings even if it didnt run at 2:1 ratio. As i said, being hynix a-die, getting some low timings should be fairly "easy". Thing is, most ryzen 7000 with those recent AGESAs should be expected to hit 6000 at 1:1 ratio even with 2x32 sticks right? i know its not 100% guaranteed but... you know, almost.

Yes, 6000 with tightened timings will give you peak performance. You should be able to maintain 2x32GB sticks at 6000 at 1:1 unless you get extremely unlucky. Of course it also depends on the number of ranks as well.

I'd recommend checking out buildzoid's channel as he does some excellent 7000 series memory tuning videos. He heavily tests the timings he gives out so it saves a ton of trail and error time.

 

[LethaR]

Yes, 6000 with tightened timings will give you peak performance. You should be able to maintain 2x32GB sticks at 6000 at 1:1 unless you get extremely unlucky. Of course it also depends on the number of ranks as well.

I'd recommend checking out buildzoid's channel as he does some excellent 7000 series memory tuning videos. He heavily tests the timings he gives out so it saves a ton of trail and error time.

yeah! i know him, he's basically the reason i decided to go and get some hynix a-die ddr5 to try to maximize performance. If i achieve 6000 cl30-35-35 or something similar mantaining 1:1 ratio, i would be more than satisfied. The kit is probably going to arrive this friday, and ill start doing some tests the very same day. I'll keep you updated

 

[ir_cow]

I'd recommend checking out buildzoid's channel as he does some excellent 7000 series memory tuning videos. He heavily tests the timings he gives out so it saves a ton of trail and error time.

He also uses XOC voltages and kills CPUs...Soo it's informational but I wouldn't copy paste the values.

 

[evernessince]

He also uses XOC voltages and kills CPUs...Soo it's informational but I wouldn't copy paste the values.

There's no risk to copy pasting the sub-timings themselves. That said, yeah typically wise to use a lower voltage and only bump up as needed. I was able to get some pretty tight timings on 1.2V SOC myself.

 

[ir_cow]

Yes, there is no risk of damage by copying the timings, but it probably won't boot and or be stable without voltage adjusts too.

Just saying be careful as not everyone knows what voltages are considered safe for daily use. Even that is debatable in the XOC space. If your looking for years of life, it going to be lower.

Edit: before I got into memory overclocking I used to watch his content also. I'm not going to bash the guy for providing information that otherwise wouldn't be available. I'm sure not going to make videos anytime soon.

What is completely left out is the fact that the CPU IMC, Motherboard used and type of memory all play a role in a nice overclock. You can overcome some of it with extra voltage, but not always. For a experiment once I copied his exact settings (had the same MB, CPU and RAM). Yeah.. it wasn't stable. But I already kinda knew this from binning stuff myself.

This is also why overclocking in a memory reviews is informational but ultimately holds no weight as far as the product goes. Ram kits are never guaranteed to be the same outside the bin. the same CPUs IMC is never the same and required voltages are often never the same.

Yeah Hynix A die can OC to DDR5-12000. Just make sure to have LN2 on hand