I just built a powerful workstation with 128GB of RAM (4x32GB), using an MSI x670e motherboard paired with an AMD 7950x3D processor and a 4070 graphics card. The issue I'm facing is that the system works perfectly with just 2 sticks of RAM, but fails to boot with all 4 installed. I really need the full 128GB for handling large 3D scenes, so I'm hoping to find a solution. Any advice?
4 Answers
It’s known that the AMD memory controller can struggle with 4 sticks of RAM, especially if you're using an overclocked profile like EXPO. It might be more stable without it. If you're experiencing issues, try manually setting lower speeds than EXPO or increasing the voltage. According to MSI's compatibility info, Hynix memory chips often perform better when overclocked.
First off, update your BIOS and consider disabling EXPO if it's enabled. Four sticks on AM5 motherboards typically can't run at high speeds. Did you get a single 4x32GB kit? Using two 2x32GB kits can lead to compatibility issues. Also, if you’re not picky about speeds, there are 2x64GB options, though they can be pricey.
What’s the exact RAM model you’re using?
Have you tried leaving your PC on for about 30 minutes after booting? Sometimes training 4 sticks can take longer than expected.

Yeah, I'm not looking for super high speeds—just need the RAM for textures with large scenes. What’s EXPO by the way? I bought all 4 sticks from the same kit, so they should match.