NVidia A100-SXM4-40GB Not Found / Ubuntu

[jtswizzle89]

Been trying off and on for 2 days to get the new NVidia A100-SXM4-40GB cards to work on Ubuntu 18 or 20 with Hashcat.

nvidia-smi output shows driver and CUDA versions and picks up all of the cards as it should; running 'hashcat -I' shows nothing - or complains about no CUDA compatible devices. Have tried 6.1.1 and the latest Beta as well.

Driver Version: 455.32.00
CUDA Version: 11.1


I repeat the same exact installation steps using the older Tesla V100-SXM2-32GB (bare Ubuntu install, update, install CUDA 11.1 with 455.32.00) and hashcat works just fine.


Any thoughts? Is the A100 just too new at this point? I'm looking to see what kind of performance increase I can get out of the newer cards.

[royce]

I saw a thread where someone suggested falling back to CUDA 11.0 or 10.1?

[jtswizzle89]

I saw a thread where someone suggested falling back to CUDA 11.0 or 10.1?

Good suggestion! -- The A100 GPU's require CUDA >= 11.0...I've just been grabbing the newest 11.1 from NVidia's install instructions. I'll try straight 11.0 next time I boot an instance up and give it the old college try. CUDA 11.1 is working perfectly fine with the Tesla V100-SXM2-32GB (released in 2017 vs the the A100 which was released mid-2020) with the same 455.xx driver. 

[Chick3nman]

If they are the SMX4 A100s, you need to install and run the Nvidia Fabric Manager