I just upgraded my PC to an AMD Ryzen 9 9950X3D along with new RAM and motherboard, but now I'm facing serious instability with crashes occurring at random times. My setup includes a 64GB Kingston Fury Beast DDR5, a Gigabyte X870E Aero motherboard, and I have a Gigabyte RTX 4080 Super GPU, among other components. I've done a fresh Windows 11 install and updated all drivers, yet the crashes persist—sometimes even when the PC is idle. The CPU temperatures seem fine, but I'm noticing strange behavior like stuttery mouse movement after playing certain games. I've already tried several troubleshooting steps, but nothing seems to work. Can anyone help me figure out what might be causing these issues?
3 Answers
The same thing happened to me when I upgraded my MSI PRO X870-P motherboard to the 9950X3D a month ago. The computer experienced random freezing, stuttering, and a "drunk" mouse cursor. The problems got worse if I tweaked the BIOS, especially undervolting, but even at default settings across the board, the symptoms would return. The symptoms would appear both when under load and when just idling. Incredibly frustrating. MSI's website has a PC builder feature, and when I specified my CPU, 64GB RAM, and RTX 5080 GPU, it told me I was using an inadequate motherboard and suggested the MSI MEG X870E ACE MAX. I ordered it on Amazon, installed it ... and every single problem instantly disappeared. No matter how aggressively I tweak the BIOS, the system remains completely stable. I was unaware that the right motherboard could have such a significant impact.
It’s worth noting that 64GB of RAM can be tricky. If you’re using 2x32GB modules, the system should ideally handle it. But if for some reason it's running as 4x16GB, that could be problematic. AMD's site mentions that there can be limits on memory speeds with different configurations. I recommend underclocking your RAM to 3600MHz to see if that stabilizes your system for testing.
You might want to start by running MemTest86 to rule out any memory issues. Unstable RAM or problems with the CPU's memory controller could definitely lead to the crashes you're seeing. It sounds like it could be a memory issue considering the amount of RAM you're using.
I did go with 2x32GB, so I thought I was safe there. Are you really suggesting it might not be able to handle 32x2 even at JEDEC speeds? That's kind of worrying.