I've been experiencing a WHA_UNDETECTABLE_ERROR BSOD whenever my PC is under moderate to high load. After checking the voltages with HWMonitor and HWinfo64, I found that the 12V and 5V rails were below spec (12V was under 11.4V and 5V was at 4.6V), but the main issue seems to be with the 3.3V rail, which is showing 3V under load. Initially, I thought my PSU was the culprit, but after testing the cables separately, they showed the correct voltage. After reseating everything, only the 3.3V rail dips to about 3.08V under load. I'm suspecting my motherboard's VRMs might be failing since I've had the B550 Tomahawk for five years, and I'm not keen on spending more money on the same board just to potentially fix this issue. I'm not getting BSOD crashes lately, but is it okay to keep using the PC like this, especially for gaming? Could the problem be tied to something else?
1 Answer
It's good that you checked the PSU and cables, but just having the right voltages at idle doesn't guarantee everything's okay under load. Your PSU might still be struggling to provide consistent power. Since the 3.3V rail is dipping under load, it could point to failing components, like your motherboard or RAM (since some DIMMs work at 3.3V). I'd suggest testing your RAM one stick at a time to rule that out. If the issue persists, it may be wise to consider getting a new PSU before replacing the motherboard. Better safe than sorry when it comes to your hardware!
If you've already done a memtest and it came back clear, that’s a good sign! It typically detects most DIMM issues, but just to be sure, swapping DIMMs could help verify if one of them is causing the problem. It's worth checking!