Question Memory for Threadripper 2x

Mar 20, 2020
Hello Everybody,
I built a Ryzen Threadripper 2920x system with below components:
  • MB: Gigabyte X399 Auros Pro (Bios upgraded to F2)
  • Ram: G.Skil Flare X F4-3200C16Q-64GFX
-PW supply: EVGA SuperNOVA 1000 G+
-GPU: Gigabyte GeForce RTX 2060 OC 6G

I use the machine for scientific computing (CFD, FEA), thus a memory bandwidth and quad channel memory functionality is very important.

The system showed several instability issues causing faulty file system/programs and BSOD every ~5 hours. Memtest86 shows many errors (~1000 errors) with XMP on or off and frequency range from 3200 MHz down to 2400 MHz. Windows crash report points out to hardware memory issues too.
I tried testing the modules one by one, 3 three modules pass full Memtest86 test @3200MHz, 1 module fails the test at any frequency (even 2133 MHz). The faulty modules shows ~500 errors when tested individually. So I conclude that one module is faulty and the other modules are Ok as well as the Motherboard and CPU. Unfortunately the supplier is not willing to provide a replacement timely, they ask 4-6 weeks time to replace the memory.

I have to order new ram, I doubt between the below from Corsair:

The reason I doubt on CMK64GX4M4B3200C16 is that Corsair site does not mention it is compatible with X399, but only TrX40 is mentioned. Gigabyte website lists 16Gb version of this ram (C3200C16) in QVL but not for the 64 Gb.

The reason I doubt on CMK64GX4M4C3200C16 is that Corsair website does not mention it has quad/dual channel configuration (it does for the other one (C3200...)). It does mention that this memory is compatible with X399.

Please help me to select the right memory to be compatible with Threadripper 2920X, Gigabyte X399 Auros Pro and comes with quad channel capability.

Thanks, Median