As of this post, I get an error message within Karma render when attempting to utilize Optix Denoiser saying that no supported cards exist. My system has an NVidia 1080ti 11GB and an NVidia 2070 Super 8GB cards. Optix denoiser has worked in other render engines using these cards on this system.

Thought I'd pass this along in case anyone has feedback or it's a legit bug.

Windows 10 64 bit latest with latest NVidia drivers.

Working fine here. I didn't upgrade to 440 drivers though.

jsmack
Working fine here. I didn't upgrade to 440 drivers though.

That's probably the issue then. Hope SideFX releases an update soon.