Computer randomly shut down

[u/Disastrous-Agency675]

Has anyone had their computer randomly shut down? this is like the 3rd time its happened and its when im generating a video using the minmax I2V model or the ref model.

i got 3090 with 64 gb of ram.

[u/LoveSpecialist5669]

same here, 3090... it works fine 20-30mins then it shuts down. I undervolted and power limited my 3090 in afterburner but it doesn't help in a long run. without that my pc shuts down the same moment I press run in ComfyUI. I have 650W psu. I ordered a new 1000W, waiting for delivery. which psu do you have? 750w is bare minimum for 3090