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CPU Bottleneck affect PhysX performance?

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If you have a CPU bottleneck will you get the same fps with or without PhsyX? I guess I'm asking if PhysX performance is affected by the cpu like a typical cpu bottleneck would do, or is it solely relied on the GPU.
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Quote:
Originally Posted by Mudfrog View Post

If you have a CPU bottleneck will you get the same fps with or without PhsyX? I guess I'm asking if PhysX performance is affected by the cpu like a typical cpu bottleneck would do, or is it solely relied on the GPU.


Yes and no. If you mean PhysX is done by CPU then definitely yes. GPU PhysX hardware acceleration is less dependent on CPU but not entirely free from CPU. Main renderer depends on how fast the PPU to process the data. Higher PhysX settings increase the amount of data back and forth CPU-GPU+PPU. It will BN an already BN CPU.

 

Difficult to deftly explain. The BN is not entirely on CPU but the dedicated PhysX card also. Slower PhysX card will slow down main renderer card. PhysX performance is more affected by the PPU itself next to CPU.

 

 

Quote:

 If you have a CPU bottleneck will you get the same fps with or without PhsyX?

 

If you mean a single card doing PhysX and rendering, it won't bottleneck more with PhysX. But without PhysX should get higher FPS.


Edited by Ken1649 - 2/22/12 at 6:36am
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