Video Card Questions

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Video Card Questions

Postby undream » Thu Dec 16, 2010 11:33 pm

undream Thu Dec 16, 2010 11:33 pm
Hello.
I know there are a lot of video card topics around here, but I wanted to create my own for more general questioning then comparing two cards.
I'm totally new to GPU rendering process, and I would like to learn which spesifications (on a card) are important for a GPU render process ?
So I can compare things on my own.

At first I thought it is only related to the number of cuda cores, but I'm guessing it's not. Guide me.
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Re: Video Card Questions

Postby mib2berlin » Fri Dec 17, 2010 7:06 am

mib2berlin Fri Dec 17, 2010 7:06 am
Hi, octane is only related to the number and the actuality of cuda cores for speed.
Double cores nearly double speed.
You could compare speed with GFlops, the gtx 580 reaches 1581,1 GFlops, a gtx 480 1345 GFlops.
http://en.wikipedia.org/wiki/FLOPS
For textures you need VRam, a 4096x4096 pixel textur uses about 150 MB.
The VRam is not added on multiple cards, every information (mesh, textures) must load in every card.

Cheers mib
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