Blackmagic Forum

Hello,

I upgraded to v17 a couple days ago.
Today I created a vid with 4/5 text effects and I noticed that my VRAM went up to 85% usage.. I own a GTX 1660 6GB.

I'm new to Resolve but it seems a bit too much for a few effects and nothing else; what would happen if I were to add something else? Swapping to page file? Is this "normal"?

Thanks

VRAM is there to be used. If you're working with 4K, 6 GB will run you out. And it doesn't get swapped to disk but to RAM.
It's illogical to expect that a software that is advertised to do everything in GPU doesn't use up the VRAM.

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Thanks, I thought that 5GB VRAM was high enough for a 1 minute video but I see what you say.
Luckily I'm not going to do professional stuff

roughnecks wrote:Thanks, I thought that 5GB VRAM was high enough for a 1 minute video but I see what you say.
Luckily I'm not going to do professional stuff

Hi.

In Resolve the CPU is used to run the app, disk I/O, fusion, compression and decompression of codecs.
Resolve does all its image processing in the GPU on the graphics card. More CUDA/OpenCL Cores are better.

4K videos have 4 times the pixels of HD. And for 4K is the absolute minimum 6 GB of vRam on the Graphics Card, but minimum 8 GB of vRam or more are recommended.

As soon you have one video frame, will Resolve use a lot of vRam, as the video frames internally are saved as RGB 32fp ( floating point )

Regards Carsten.

I'm not sure why you both are talking about 4K. I never said to be working on 4K and in fact my video are all 1080p.

When you see high VRAM usage, you might think "I'm about to run out" which in general isn't true. Often times, the VRAM usage is basically a high-water mark: if Resolve loads something into VRAM it doesn't carefully clean it up once it's done with it. It might not need that image right now, but in a few milliseconds it might, and if it actually had deleted and freed up VRAM it would have to wait for the image to be loaded again.

Also, Resolve is streaming things to the VRAM as needed. So you could go to 80% VRAM usage immediately, but then basically stay at 80% for an hour of editing.

Other folks are talking about 4K because: a) it will use 4x the VRAM, and b) with limited VRAM and larger video you can actually run into a situation where your VRAM can't hold everything at once that it needs to and Resolve throws an error. (Which is what you were originally worried about, I think.)

Alright, thank you too for clarifying