Hey everyone! I recently upgraded my PC to a Ryzen 9 9950X3D and an ROG Crosshair X870E Hero motherboard, while using my old Kingston RAM (2 kits mixed for a total of 64GB at 4x16GB). This RAM is XMP-certified DDR5-6000 CL32, and it worked flawlessly at full speed (6000MHz) with my previous Intel setup (i9-13900K + MSI Z790 Tomahawk). However, now that I'm on the AMD platform, the RAM is only able to run at 4800MHz with DOCP II enabled since it isn't EXPO certified. Any attempts to push it higher (like 5200, 5600, or 6000MHz) lead to boot failure. I'm curious if there's any manual tuning I can do to help it reach closer to 6000MHz or if it's better to consider switching to an EXPO-certified kit instead. I've heard mixing RAM can be tricky, especially on AMD systems, so I'd appreciate any advice or solutions before I decide to upgrade. Thanks!
3 Answers
Have you tried changing the RAM speed directly in the BIOS? Sometimes a manual adjustment can help, even if it seems stubborn at the default settings.
It’s likely the problem stems from having four sticks of RAM. High speeds typically don’t mix well with four modules. You might struggle to achieve what you want with this setup.
But I’ve seen 4 sticks work fine on newer systems that support high capacities. Isn't it worth trying?
Honestly, mixing RAM kits is usually a bad idea. Even if they look the same, they can differ slightly in revisions. I'd recommend selling your current XMP kit and getting an AMD EXPO kit. It’ll likely save you a headache in the long run!
I'm definitely considering it! I just wanted to see if there was a chance I was missing something before I make that jump.
Yes, I did try that, but it just refuses to boot above 4800MHz. It keeps failing to start.