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Cuda core vs stream processors? and what are polymorph engines?

post #1 of 4
Thread Starter 
I am upgradding from an ATI 5770 to a 560ti.

Apparently the 5770 has 800 SPUs where as the 560 ti has 384 cuda cores.

What is the relationship between the two?

Another question I have are "polymorph engines".
They seem to have something to do with dx11 tesselation? So why dont the ati cards have more of them since their branded at being better at it than the 5000 series.
For example a 6870 has 1, 6950 2, 560ti 8 and 580 16?
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post #2 of 4
Cuda cores = SPU's . ati puts more on their gpus but nvidia has less but more powerfull .
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post #3 of 4
Quote:
Originally Posted by andypc View Post
I am upgradding from an ATI 5770 to a 560ti.

Apparently the 5770 has 800 SPUs where as the 560 ti has 384 cuda cores.

What is the relationship between the two?

Another question I have are "polymorph engines".
They seem to have something to do with dx11 tesselation? So why dont the ati cards have more of them since their branded at being better at it than the 5000 series.
For example a 6870 has 1, 6950 2, 560ti 8 and 580 16?
Architectures work differently, to differing extents of efficiency, so it's very tough to compare them. Number of cores or operating frequency doesn't mean much--you'd need to look at actual performance numbers.

Synonymous with the fact that a current intel cpu can complete more calculations during a single clock cycle than a current amd can--it's all about architecture.
    
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post #4 of 4
Thread Starter 
Quote:
Originally Posted by guyladouche View Post
Architectures work differently, to differing extents of efficiency, so it's very tough to compare them. Number of cores or operating frequency doesn't mean much--you'd need to look at actual performance numbers.

Synonymous with the fact that a current intel cpu can complete more calculations during a single clock cycle than a current amd can--it's all about architecture.
Yeah but then, through my research it seems that both are fairly similar in their raw power(1 to 1) but ATI stream processors are harder to program for? where as Nvidia cards are super easy. Hence why ati cards run cooler and nvidia cards are much better at F@H.
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My System
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Hard DriveOptical DriveOSMonitor
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