Dual 3090 crashes when I use both the GPUs

Hi all!

I recently purchased the following rig:

2 x NVIDIA RTX 3090
AMD Ryzen 9 3900XT
ASRock X570 Motherboard
Antec Signature 1300W Power Supply

Installed Nvidia driver 455.38, CUDA 11.1, PyTorch 1.7.1, on Ubuntu 20.04 and tried running deep learning benchmarks.

The problem is everything runs fine if I use either the first GPU, or the second GPU. But the moment when I run both of them, the PC just shuts off. I suspected power related issue but I installed Windows and ran all the GPU benchmarks but everything runs totally fine. Now I’m suspected some driver related issue. Did anyone else face something similar? Or is there something I can do to narrow down the issue? Thanks!

Am assuming you did the same GPU tests on both OS’s.

I see there’s a 455.45 Linux driver up now, which may be worth a shot.