Can't stabilize DDR5-6000 (ASRock B650M-HDV/M.2)

- Ryzen 5 7600 w/ stock cooler @ PBO 85C
- ASRock B650M-HDV/M.2
- G.SKILL Ripjaws S5 Series 32GB (2 x 16GB) 288-Pin PC RAM DDR5 6000 (PC5 48000) Desktop Memory Model F5-6000J3636F16GX2-RS5K

Basically, while I can POST on the stock JEDEC 4800 MHz, I cannot get consistent POST on anything much higher. When I do clear POST with higher settings, I can run hours of memtest86 always with zero errors. But, eventually on restart, POST will fail the memory training -- 3-beep memory error, and I get reset back to JEDEC 4800. Extremely frustrating.

I did mess up in buying this particular RAM kit, which actually has the Intel XMP Profile rather than AMD EXPO. However, the updated BIOS does provide me with the XMP1 setting, and either way, I'm told ultimately this shouldn't matter - that I should be manually setting timings.

So far I have not had success with most settings. It may have been stable at like, 5200 MHz? But I'm not even certain of that (not enough testing.) But if I can't even get 5400 MHz (90% of my rated spec) it really seems like something is physically wrong? I think I can still RMA my board if I do it somewhat soon.

- Has anyone else here had, or resolved similar issues?
- Can you tell me good timings or things to try (like specific things to set in the BIOS POST memory trainings?)
- Do you think I should RMA my motherboard, RAM, and/or CPU while I still can?

Thanks.

Thanks so much!! I've worked on and asked about this for many weeks, and not one person informed me of that.

One thing I noticed is, the XMP1 profile timings seem REALLY different than the base JEDEC. With some being more and some less. Can you tell me if there might be inherent differences between XMP and EXPO timings that are working against me / compromising stability, especially with the Ryzen 7600? I just never even knew RAM kits would have Intel vs AMD timings.

Actually... looking more into this, and even 7700X and 7800X3D only officially support 5200. But most people seem to have no problem running 6000. Do you think I just lost the silicon lottery, and if so was it on the CPU?

Well, I never got a single error on 5+ hours of memtest86 at any speed that I tested. Looking over my notes, I had tested up to 5800 MHz. 1 full pass no errors for that, and I moved on to other testing (at the time my Windows 10 was corrupt and crashing me out, so you can imagine that caused a lot of confusion.) But even though memtest never had 1 error, I'd fail POST.

- Couldn't there still be a solution for me in adjusting BIOS settings in POST?
- If I can't stabilize over 5200 do you think it's my CPU that "lost the lottery" ?

- Can you tell me the complete set of timings your EXPO profile sets you to? That would give me a basis of comparison for my XMP profile timings.
- When you were getting memtest errors, were you still passing POST every time? How often did you experience the 3-beep memory error resetting you to 4800?
- Again, if I can't get over 5200 MHz, do you specifically think it's the CPU? I want to know this, because I'm on the fence about upgrading my CPU anyway.