Octane crashing computer to black screen

[moteh]

Hey

I hope im posting this in the right place

I've just build a new pc, and everytime i start octanerender inside Cinema4d, it crashes my computer to a black screen after a couple of seconds - to a degree where i cant even shut it down by holding down the powerbutton. Ive searched the forum and the web in general for solutions, and i've tried everything i can think of. At the moment im running Cinema4d R20, Octane 4.0 and Nvidia driver 417.71. Ive tried both the newest nvidia-drivers and older ones, but no luck. Also tried the latest version of octane.
I have two GPU's, a Geforce 2070 8gb and a 1060 6 gb. Tried only having the 2070 in > same problem. When i only had the 1060 in though, it seemed to work.
Allso tried with both cards in Octane Standalone, and this worked fine.

My new rig looks like this:


CPU: AMD Ryzen 7 2700X with Wraith Prism - Pinnacle Rid

PSU: EVGA GQ 750 PSU

MB: MSI B450 TOMAHAWK Bundkort - AMD B450 - AMD AM4

GPU: MSI GeForce RTX 2070 ARMOR - 8GB GDDR6
MSI Geforce 1060 - 6 GB

RAM: G.Skill RipjawsV DDR4-3200 C16 DC - 16GB


Really hope someone can help!

Thank you

/Morten