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32 cores,128GB RAM and 5 fps?

PostPosted: Sun Aug 18, 2013 10:11 pm
by zeekearl
I hope I'm just a newb and there's an easy answer to my situation, but I can't figure it out.

I recently was given a Dell computer with the following specs (previously I've only used Macs):
- Xeon CPU-2680 @ 2.7 ghz (2 processors, 32 cores)
- 128 GB RAM
- 64 bit operating system
- Nvidia Quadro 5000
- Nvidia Tesla C2075

I've been shooting with the Black Magic Cinema Camera in RAW.

The problem is that Da Vinci Resolve won't typically render or play back above 5 or 6 fps. Everyone once in awhile it will jump up to 20 or 30 fps for a brief period of time.

Right now I'm rendering my raw footage into QT Uncompressed 10 bit and it won't budge above 5 fps.

According to my task manager it's only using between 0-5% of my CPU power and 13GB of RAM at any given moment. It seems to fluctuate between using 1 to 2 cores.

Why won't Resolve use more power?

I would really appreciate any help on this - thanks in advance

Re: 32 cores,128GB RAM and 5 fps?

PostPosted: Sun Aug 18, 2013 11:07 pm
by adamroberts
Resolve uses the GPU for image processing. The CPU is only really used for the encoding.

Your bottle neck is probably your GPUs and you hard drives.

Can you give details of those GPUs? VRAM?

If you drop a GTX670/680/770 in you will get much better performance.

Re: 32 cores,128GB RAM and 5 fps?

PostPosted: Sun Aug 18, 2013 11:29 pm
by zeekearl
Oh, ok - thanks for your reply

The Quadro 5000 has 2.5GB of dedicated RAM, but in the Nvidia control panel it says it makes use of 67GB of Ram. The Tesla C2075 has 6 GB of dedicated RAM - the Tesla is supposed to be some sort of computational accelerator, but I don't really understand it.

The harddrive is a internal 4 TB WD 7200 rpm drive... is that what's slowing me down?

Re: 32 cores,128GB RAM and 5 fps?

PostPosted: Sun Aug 18, 2013 11:37 pm
by adamroberts
What card is your display connected to?

Try only connecting to the 2nd card and leave the Quadra free to just do image processing in Resolve.

The Quadra only has 352 CUDA cores. Not a lot when it come to Resolve. The GTX670 has 1344, the GTX 680 has 1536. CUDA cores is what does the image processing.

As for drives. You are best served with having a RAID drive and having your footage on a different drive to the one you render to.

You might want to read the Resolve config guide. It's a bit dated now but it give you a good understanding of what make a good Resolve workstation.