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What is CUDA cores and Stream processors?

post #1 of 10
Thread Starter 
Hi all.
What is is CUDA cores and Stream processors? How do they differ?
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post #2 of 10
They are the same. Nvidia and ati/amd call them stream processors, but nvidia to difirentiate itself calles them CUDA cores.
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post #3 of 10
There's no real difference between CUDA cores and stream processors.They do the job of the old pixel and vertex shaders. There ARE differences between them which is why AMD has 1,000+ on their cards while Nvidia has 512. But they do the same job. Even though they do the same thing they use differant configuations so they are not comparable, 1 CUDA core= 1 Stream processor, but cards at the same price point perform similarly
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post #4 of 10
They also are able to compute certain instructions, very well, that previously only the CPU could handle. The result is things like encoding video on the GPU rather than the CPU, leading to much faster transcoding etc.
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post #5 of 10
Quote:
Originally Posted by MoBeeJ;14236552 
They are the same. Nvidia and ati/amd call them stream processors, but nvidia to difirentiate itself calles them CUDA cores.

IIRC, I read somewhere the SP calculations goes like this ATI 800/5 = 160 stream processors (NVIDIA)
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post #6 of 10
Thread Starter 
So, the more powerful GPU would have more Stream processors/CUDA cores, right?
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post #7 of 10
Quote:
Originally Posted by vinton13;14236857 
So, the more powerful GPU would have more Stream processors/CUDA cores, right?

If clocked the same as the card you are comparing it to. there are a few variables involved but usually yes that is right
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post #8 of 10
Thread Starter 
Quote:
Originally Posted by brkbeatjunkie;14236918 
If clocked the same as the card you are comparing it to. there are a few variables involved but usually yes that is right
Right. Wanted to make sure of that. Thanks a lot guys. smile.gif
Rep'd
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post #9 of 10
Quote:
Originally Posted by dhenzjhen;14236729 
IIRC, I read somewhere the SP calculations goes like this ATI 800/5 = 160 stream processors (NVIDIA)

Yes , but that's because nvidia uses more expensive , high-clock , high performance shaders while amd uses less expensive / lower performance but more shaders .

That's why you see 3-4x more shaders on amd cards .
Edited by madalin - 7/16/11 at 1:15pm
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post #10 of 10
Quote:
Originally Posted by brkbeatjunkie;14236642 
They also are able to compute certain instructions, very well, that previously only the CPU could handle. The result is things like encoding video on the GPU rather than the CPU, leading to much faster transcoding etc.

The quality is crap though. Even the x264 developer looks down on it.

Their much better for complex mathematical equations that would take a CPU alot more time compute.
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