GPU suffered harm due to excessive load on the power supply unit.
GPU suffered harm due to excessive load on the power supply unit.
The issue involves a failure where the system stops lighting up after starting, and the motherboard remains stuck on the VGA debug light. The sequence of events suggests a power-related problem rather than a hardware fault in the GPU itself. The user suspects insufficient power delivery from the PSU, possibly due to an undersized unit, even though the PSU was upgraded. A loose GPU power connector was also observed, but it doesn’t seem to be the main issue. Attempts to resolve included changing the PSU, re-seating the GPU, resetting BIOS via CMOS removal, and borrowing a working GPU. The concern is whether inadequate power supply can cause a GPU to shut down completely, despite normal operating temperatures during testing. The question seeks understanding of how low power can affect performance and whether repairs are feasible without warranty.
you're right that using a low-wattage PSU might lead to blue screens and crashes unless the PSU fails, which could cause damage. However, many good PSUs come with solid protections. For a 3090 GPU, which can sometimes draw over 450 watts, a 700-watt PSU should provide sufficient power. Still, it's not always easy to figure out the issue and might require replacing parts or testing thoroughly.
For what its worth I was able to pull 650w at the wall with my tuned 5900X and 3070Ti running F@H. Good chance its fucked. 30 series has some mean transients.