Piotr Wozniacki wrote:Dear Rohit,
Could you please elaborate why should a version of Resolve run better with monitor on my 2nd GPU, while another version doesn't care for that?
Thanks
Piotr
Just to be clear he wasn't suggesting that it would run better, at least how I read his comment. As I read his comment he suggested swapping gpu as a test to see if OpenGL is running correctly.
Rohit Gupta wrote:One of the things to check is that OpenGL is running on the GPU connected to the display. One easy way to check this is to move your monitor to your 2nd GPU. (You control this in NVIDIA control panel)
As an aside, it's a good chance the issue is driver related. Nvidea and AMD have both been rushing driver updates out the door for the last few years.. In some cases it's to fix bugs, in others to add and remove features. It's all gotten rather messy, and caused a lot of problems for developers and end users.
for example read this about How Nvidia drivers decreased performance for a little while earlier in the year. Note the bolded part.
https://www.pugetsystems.com/labs/suppo ... IXED-1376/Summary of issue
In some of our recent testing, we noticed that we were getting much lower benchmark scores in DaVinci Resolve compared to what we have seen in the past. After trying multiple versions of DaVinci Resolve Studio (ranging from 15.0 to 15.3), multiple hardware platforms, and many other troubleshooting steps, we discovered that the issue was being caused by recent NVIDIA GPU drivers.
In particular, we found that the following drivers are causing 11% lower FPS on average in the Color Tab, although in some cases the performance drop was as large as 20% depending on the codec and grade. The NVIDIA drivers that we have confirmed to have this issue are:
418.81 - Released Feb 04, 2019
418.91- Released Feb 13, 2019
419.35 - Released Mar 05, 2019
Note that while we have confirmed it with these driver versions, the issue will likely be present with future driver releases as well until NVIDIA, Blackmagic, or Microsoft (depending on where the root of the issue is) are able to implement a fix.
We have confirmed that this issue occurs with NVIDIA's GeForce RTX line of cards, but have not tested it with the older GTX series. It appears to be fairly universal in terms of what codecs are affected including H.264, DNx, ProRes, BRAW, CinemaDNG, and RED footage.
I'd also assume that because you are running dual cards you are even more susceptible to driver issues, as the manufactures have been pushing users towards one powerful card instead of two lesser ones.
AMD 7950X | AMD 7900XTX (23.20.24) | DDR5-6000 CL30-40-40-96 2x32 GB | Multiple PCIe 4.0 X4 NVME | ASUS x670e HERO | Win 11 Pro 23H2 | Resolve Studio 18.6.5 B7