Bug Report NVENC causes GPU memory to downclock

enemy2k

enemy2k

New Member
I've noticed a serious issue whenever I use Open Broadcaster Software (OBS) with NVENC, my memory on the GPU down clocks to 3,000 MHz (6k effective), it should be at 4,000mhz (8k effective). This downclock only happens when I start to stream/preview stream using NVENC encoding through OBS.

I am using a GTX960 on Windows 8.1 with the latest WHQL 347.52 drivers. And I am using the newest beta version of x64 OBS version .64b
 
Last edited:
R

R1CH

Forum Admin
Developer
This is more a question for NVIDIA as OBS has no control over your memory or GPU core clocks.
 
enemy2k

enemy2k

New Member
Thank you for your response. I contacted you guys first since I can only reproduce this issue using NVENC with OBS. Regular Shadowplay through Nvidia works fine. I'll contact Nvidia. If I get a response from them, I'll update the thread!
 
enemy2k

enemy2k

New Member
An update, another user is reporting the same issue on my thread at the Nvidia forums. Will update with any further findings for anyone who is suffering the same issue.
 
enemy2k

enemy2k

New Member
Got a reply from an Nvidia Rep ManuelG.

"CUDA is used in NVFBC. Because many of the use cases where an application uses CUDA, precision has a higher priority over speed. This is part of the reason why workstation CPUs and GPUs typically run at a lower clock speed than their consumer equivalents. We are developing an app profile system to catch cases where CUDA is used for consumer level applications (such as OBS) so that the memory clock speed will not clock."
 
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