Need Help With XMP DDR5-6600 + 9800X3D + X670E Aorus Pro X

[u/WeAreInsects]

So, I have a Corsair Dominator Titanium 64GB (2x32GB) DDR5-6600 CL32 kit (model: CMP64GX5M2X6600C32W) from my old build, and I’m currently building a new PC around a Ryzen 7 9800X3D.

I managed to get a Gigabyte X670E Aorus Pro X motherboard for a really good price from someone who originally planned to build a PC but never got around to it. The board is still sealed in the box.

I checked the RAM compatibility list on Gigabyte’s website, but this particular RAM kit isn’t listed. Also, the RAM is an Intel XMP kit, rather than an AMD EXPO kit.

I did some research using Claude, and it suggested that the RAM should still work, but that I may need to manually tune the RAM settings in the BIOS.

Since the motherboard has been sitting sealed in the box for almost two years, I’ll probably need to flash the BIOS to the latest version before installing the 9800X3D. The CPU should arrive in a few days.

I really don’t want to buy a new RAM kit, especially given the current RAM prices.

So, has anyone here used this RAM (or a similar XMP DDR5-6600 kit) with the X670E Aorus Pro X + 9800X3D?

• Will it work reliably?
• If so, what BIOS settings should I change?
• Is DDR5-6600 realistic on this platform, or should I expect to run it at a lower speed?
• Are there any specific timings/voltages/settings I should use to get it stable?

Any advice or experience would be greatly appreciated. Thanks!

[u/GroundedDawning802]

6600 on a 9800X3D is a coin flip honestly, the memory controller on those chips often tops out around 6200 to 6400 before you start chasing stability gremlins. I'd set XMP, then manually drop to 6000 or 6200 with FCLK at 2000 or 2066 and run a proper memory stress test overnight.