I just built a new PC featuring a 7900XTX graphics card and a 7800X3D processor, and I'm using 4 sticks of CORSAIR VENGEANCE RGB DDR5 RAM at 32GB each, totaling 64GB at 6400MHz CL32. However, my RAM defaults to 4800MHz, and whenever I try to enable XMP to unlock its full potential, I end up with a black screen and have to reset my CMOS. Although I'm getting high frame rates in games, I'm experiencing some stuttering, and I'm concerned it might be related to the RAM not running at the intended 6400MHz. Any advice would be appreciated!
4 Answers
Try removing 2 of your RAM sticks, specifically the ones in slots 1 and 3 (counting from left to right from the CPU) and see if that helps. Sometimes having all four sticks can cause issues with higher speeds.
The 7800X3D officially supports 2 sticks at 5200MHz and 4 sticks only up to 3600MHz. Many users can manage 2 sticks at 6000MHz without issues, so that's typically the recommended way to go. I managed to run mine at 6000MHz for 2 years, but now I'm at 5800MHz, so it can fluctuate over time.
Keep in mind that CPU manufacturers usually approve memory speeds for only 2 sticks rather than 4. So instead of aiming for 6400MHz, try manually setting your RAM to a speed between 5500MHz and 6000MHz, which should improve stability and reduce jitters without sacrificing much performance.
If you continue having trouble, consider returning the 4 sticks and switching to just 2 sticks of 32GB at 6000MHz CL30. The AM5 platform often struggles with 4 sticks, especially at speeds above 6000MHz, so this could solve your issues.
That sounds like a hassle! But I guess it's better to have a stable system.
Why 1 and 3? Is there a specific reason for that? Just wondering!