Memory advice
Memory advice
You're facing stability issues with your RAM, especially at high temperatures. It might be worth considering a replacement. For a 64GB setup, you'll want a compatible 64GB kit that matches your system specs. Since you plan to add a custom water loop soon, make sure the new RAM supports that upgrade path.
these are the sole 6800 supported RAM options from Corsair for your motherboard. As shown in the list, your motherboard doesn’t accept 6800/C32 RAM, which means your case is a normal outcome. Return the RAM, purchase a compatible kit, or opt for a 64GB 6000 CL30—you won’t be able to run these 6800/C32 models on that board, though they might function at their original speed.
I don't agree with that. Those RAM modules have specific timings that must fall within a certain range, and locating them would be difficult since they haven't been thoroughly tested. It would be a waste of time. When I had incompatible RAM, I managed to run at 6000/CL30, but the timings weren't supported—something like 30-36-36-36 or similar. My system was still detected correctly, but randomly it would freeze completely and I had to shut it down. After restarting, one of the sticks would be marked as unknown in the BIOS, leaving me with only half the RAM active. That was really frustrating. I ended up buying the same exact RAM with slightly slower timings (30-40-40-40), which was listed as compatible for my motherboard. Now everything works smoothly. I wouldn't attempt to underclock or overclock RAM on AM5 unless it's confirmed in the compatibility list, because instability is likely and troubleshooting becomes a hassle. Also, 6800/CL32 sticks cost a lot of money, and if they can't run at that speed, it's just wasted money.
It was similar with DDR4, but DDR5 and AMD setups tend to be more sensitive, especially at higher speeds. The 6000/cl30 range offers a good balance of stability and performance. I've spent a lot adjusting DDR4, but DDR5 is quite fragile based on my experience. From a cost perspective, using RAM rated for speed comes with high expenses and compatibility issues can make it unprofitable. Slowing down non-working RAM can cost around $400, while the 6000/cl30 unit costs just $329—making the latter a much more sensible choice.
... I don't think you know what you're talking about. Yes, there are subtimings for a given set of sticks, but a) these are almost entirely dependent on the memory IC used, b) looser versions of these would work, so just dropping the clock speed would if anything make them more stable, and c) the motherboard handles this unless you otherwise specify, and it's usually pretty good at figuring these out. These sticks are Hynix A die based, and use the same PCB that basically every other RGB Corsair kit uses, so compatibilty in that regard should be fine. The XMP profile almost certainly won't work (hence why this isn't on the QVL), but the kit will boot, and aside from binning differences will be no different from any other 6000 CL30-36-36 kit from Corsair. Yeah, these ones specifically might not be tested, but an equivalent at a lower clock speed almost certainly was, so these should work once you drop down the frequency (assuming only 2 sticks in the correct slots and the BIOS isn't completely screwed up). Yeah, I agree that buying these sticks was a dumb move because there's no way in hell you'll get it working at the right speed and they cost an arm and a leg, though it given that it sounds like they've had them for a while they're probably outside of the return window, and in my experience these ultra high end kits don't exactly have very good resale prices, so unless you want to burn ~$150 buying a new kit, you should actually get these to work.
I don’t really understand much beyond what you’ve shared. Thanks for the detailed explanation. From your experience, I see these basics are clear, but getting the right speeds can be tricky at lower speeds. Still, if it’s an old model with no return policy, the best approach is to take your time, be patient, and figure out the proper speed and timing for a stable system. I hope you’re still available for a return soon.