Need help diagnosing dual-channel RAM issue after hardware upgrade
I'm having a strange issue with my PC. Both RAM sticks work individually, but they won't work together.
Here's what I've tested:
I installed each RAM stick one at a time in the A2 slot, and both work perfectly. The PC posts without any issues.
However, when I install both sticks in the recommended A2 and B2 slots, the PC won't post. Both RAM sticks light up, but there's no display or boot.
Before this, everything was working perfectly. The issue only started after I upgraded my:
GPU
AIO cooler
PSU
I searched around and found that uneven CPU mounting pressure from the AIO can sometimes affect memory channels. I removed and reinstalled the AIO, making sure the mounting pressure was even, but the issue still persists.
Does this sound like a motherboard issue, bent CPU socket pins, a CPU memory controller problem, or something else? Are there any other troubleshooting steps I should try?
System Specs:
CPU: AMD Ryzen 9 7900X
Motherboard: MSI MAG B650 TOMAHAWK WIFI (AMD B650)
RAM: G.Skill Trident Z5 RGB 32GB (2×16GB)
GPU: MSI GeForce RTX 5070 Shadow 2X
AIO: MSI MAG CORELIQUID A13 360
PSU: MSI MAG A850GL 850W
Any help would be greatly appreciated. Thanks!