Problems with GPU recognition in resolve 8

[Jeff Brown]

Hi All

I have a GT120 (GUI) and a FX4800 (GPU) which worked fine with v 7.12 of resolve. Having upgraded to 8 I now get the error message that the GT120 is being used for image processing and is not optimal. Both cards are installed with correct drivers and Cuda revision and show up in device manager.

Running an 8 core tower with JMR blustor expander (GUI GT120 in expander and 4800 in slot 1 of the tower).

As a result I'm getting 8-10fps when before I was getting 23-25fps.


Any suggestions?

Cheers

[Eric Santiago]

Jeff sorry to hijack your thread but have you tried other GPUs before? Reason Im asking is that I have both Quadro 4000 and 4800 and need real world results as to how much is one faster than other in CUDA.
Id rather sacrifice the 4800.

[Jeff Brown]

I've only used the 4800 (bought when Resolve came out before the 4000) I'd prefer the single slot 4000 but haven't tested though Da Vinci do say in their notes that the 4800 is the preferred card.

That's if I can get it to work.......anyone?

[Jeff Kilgroe]

Get the 4000. The 4800 is three (yes, 3) generations older. It's large, uses a ton of power, runs at a similar speed, actually slower for many operations, doesn't support many newer pixel-level functions that the Quadro 4000 and current cards offer. If you want a similar card with similar performance for a lot less money, try to source a GTX285. They're discontinued, and tend to sell in the $350 price range. As far as Resolve and other CUDA tasks go, they're functionally equivalent to the FX4800 and actually a touch faster in many benchmarks. The FX4800 is supposedly discontinued as well, but there seems to be a large number of new ones for sale out there... And at a high price, considering the performance and what the new generation cards sell for. You can buy two Quadro 4000's for the price of one 4800... Just sayin'

As for the issue of Resolve not accepting the 4800, I'm not sure. Be sure there are no displays connected to the 4800 when you launch Resolve. Beyond that, it seems that more info is needed. Perhaps the BMD/DaVinci guys could determine something from your log files.

[Jeff Brown]

Yep you got it Jeff - monitors were crossplugged without my knowledge rendering the 4800 the primary GUI (and therefore not the GPU). Also spotted super quick by Dan at Da Vinci (great customer service!)