Could My Motherboard Be Causing CPU Failures?

I've got an Asus Tuf Gaming x670e-PLUS WiFi motherboard and have been using an AMD 7950X CPU for about 2.5 years without any issues. However, one morning I powered my PC on and the orange DRAM QLED light came on. After troubleshooting, I confirmed that the CPU was faulty, and after going through the RMA process with AMD, they sent me a 9950X as a replacement. Now, just a month later, I'm facing the same problem with the new CPU! I'm starting to suspect that the motherboard might be the culprit. Is there a chance that AMD would consider RMAing the CPU again? Should I even bother trying? And what about the motherboard? I've heard it's a hassle to RMA ASUS products. How can I prove the motherboard is bad when it seems to be working, at least for a little while? Just to note, I've been using the default CPU and memory settings without any overclocking.