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What Spec Effects CUDA Rendering Speed

post #1 of 4
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I recently started using MediaCoder to format mkvs to watchable formats on my XBOX and PS3.

They have a CUDA option for rendering which is considerably faster. My GTX285 processes 5-6fps as opposed to my 4GHz 9650 processing at .5fps.

GTX560's are pretty low in price but I'm wondering what CUDA encoding performance gain I'd get from that.

Moreover, which spec should I be looking at when considering a card for CUDA specific rendering?

Thanks,
JOe K.
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post #2 of 4
Quote:
Originally Posted by tjcinnamon View Post
I recently started using MediaCoder to format mkvs to watchable formats on my XBOX and PS3.

They have a CUDA option for rendering which is considerably faster. My GTX285 processes 5-6fps as opposed to my 4GHz 9650 processing at .5fps.

GTX560's are pretty low in price but I'm wondering what CUDA encoding performance gain I'd get from that.

Moreover, which spec should I be looking at when considering a card for CUDA specific rendering?

Thanks,
JOe K.

GTX 285 has 240 Cuda cores, GTX 560 has 336 and is clocked higher.


So you'll get better performance possibly 8-10 fps as an estimate.
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post #3 of 4
Thread Starter 
Quote:
Originally Posted by Skrillex View Post
GTX 285 has 240 Cuda cores, GTX 560 has 336 and is clocked higher.


So you'll get better performance possibly 8-10 fps as an estimate.
What spec is clocked higher (relative to CUDA performance)? Graphics Clock, Processor Clock, Memory Clock?
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post #4 of 4
The pertinent specs are: shader count, shader clock, and shader 'generation' (i.e. Fermi shaders are faster than older gen shaders). Those are all that matter for CUDA performance.

In the context of your labels, I'm guessing the shader clock is called Graphics Clock, but I'm not positive. In any case, shader clocks are locked at 2x core clocks on Fermi, so your only option is to bump both Core and Shader (or graphics and processor) clocks together to increase performance, or get a card w/more shaders.
Edited by brettjv - 11/2/11 at 10:47am
    
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