Blackmagic Forum

Hello community,

I've seen this reported in other topics, but I'm choosing to put it under the 17beta5 topic since that's the version I'm running, and I haven't (yet) tied 16 release (since I LOVE 17!!!!). I'll also point out I just purchased a Studio license so its the first time I've tried and possibly noticed this issue..

My hardware: I have a decent speed machine: https://www.userbenchmark.com/UserRun/37194202 .
8 core FX-8370, 24GB 1600Mhz, 750ti/2GB (I know, slow), Windows10 home.

The problem: for some reason, I cant get anywhere NEAR the peak utilization on CPU or GPU. Even trying to do a simply auto scene cut of a SD (DV 720x480) AVI file, is excruciatingly slow. The CPU never gets over 15% and GPU barely registers. And trying to do a simply encode of said SD video (neural deinterlace + temporal NR) out to DV res, is about 2 FPS and there again, 15% CPU and 15% GPU (3D).

I realize this COULD be the GPU and plan to buy a used 1070 in a month. But still, I can't see what on earth could be throttling performance. The PCI bus and RAM seem like they should be more than ample for SD video. And CPU is running at full clock speed and cool temps...

So, is Windows 10 home / kernel known to do this? Some debug mode in 17 betas effectively throttling it?....

Any advice could be greatly appreciated!
ken

Ooooh, yeah...wait to you get a 1070 on this one.

Ken,

Probably not the most useful post I'll write. But I love 17 too. And, I know I love 17+ already!

Regards,
Eric

Make sure you are using the most current driver for that card. Beyond that I don't have any other ideas.

i'm thinking a 750Ti might not be supported with the v17 approved drivers?

The 750ti has a compute capability of 5.0 so should have no problem with CUDA11, but with only 2GB vram it is underpowered.

Thanks everyone for your feedback. Yeah, even though the 750ti should work according to the docs (2GB VRAM), it in fact didn't on Linux. So maybe BM could update the docs there. ON Windows it works, but just wasnt letting either CPU or GPU reach peak utilization.

I installed my used 1070 yesterday and it just works!!! Video and the neural stuff (neural de-interlace and speed warp) is ROCKING in 17!!! And the GPUs runs about 90% now, so at least one device is peaking performance (unlike the 750 where neither CPU or GPU reach 50%).

My last barrier now seems to be audio codecs on Linux, as I mentioned in another thread. I need AAC dec/enc plus AC3 dec (mts and mp4).. I'll have to say on Windows just for those codecs, looks like.