Finally the 10.12 drivers from ATI support V-Ray RT GPU; there is one remaining issue though: the second GPU of dual cards like the 5970 card will not work properly and needs to be disabled from the V-Ray OpenCL device select utility. Multiple GPUs on separate cards however seem to work fine. ATI are aware of the issue, so hopefully it will be resolved as well.
From my initial tests with a 5970 card, performance is very scene-dependent and gets better for more complicated scenes. I haven’t tested newer cards though.
So I have a 5870 currently as my display card and 2 GTX470s as my render cards, does this mean I could now mash them all up in a super KPaths/sec bonanza!?
No, it probably won’t work right now. Currently V-Ray RT assumes that all the video cards can load the same binary GPU code. This means that the cards must be more or less similar. Will work on this though.
Finally had some time to try this out, but after installing the 10.12 drivers and even the full control center suite I don’t get my ATI card from the select openCL devices menu, just the 2x GTX 470s. Do I have to remove the 470’s to test it out?
Not sure how to disable them without removing, can you explain that? I’ve always just popped them out, but if I can avoid it everyting that’d be great!
You can do that from the Device Manager (right-click a card and select “Disable device”; you can also re-enable it in the same way). Not quite sure how it will work if one of the cards is the primary display adapter though, so some care might be necessary
Both cards I use for render only, so no prob there.
After disablign them, I get a blank spot in select openCL device. I can actually set the the device to " ", which seems odd, instead of the “cannot find openCL device” error.
Interesting…
After restarting I still select " " as my device, hit set, and launch max, it works… Much slower than CPU though, and the look is quite different from CPU. weird. It’s getting late over here so I’ll try to post more in the morning if you’re curious.
I’m trying to get this to run on an older ATI HD4850 card but I can’t get it to run without crashing the RT status window. I installed 10.12. I can see the card in the “Select OpenCL devices” program and RT seems to be using it (see the status window). As soon as it starts though it crashes the vray.exe window. I’ve tried it in XPx64 and win7x64, both are the same. I know it won’t be that fast but should it even run or is something wrong?
vlado any idea on speed comparison ATI VS NVIDIA? number anything..?