I see now that the various card manufacturer's of video cards, Sapphire, MSI, XFX, etc. show different ratings for gpu core clock speed and single precision GFLOPS. I haven't found a source where you can compare one mfg. to another. Does anyone know if there is one and where to find it?

I see now that the various card manufacturer's of video cards, Sapphire, MSI, XFX, etc. show different ratings for gpu core clock speed and single precision GFLOPS. I haven't found a source where you can compare one mfg. to another. Does anyone know if there is one and where to find it?

Do you mean like this?

http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-7.html

I see now that the various card manufacturer's of video cards, Sapphire, MSI, XFX, etc. show different ratings for gpu core clock speed and single precision GFLOPS. I haven't found a source where you can compare one mfg. to another. Does anyone know if there is one and where to find it?

Do you mean like this?

http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-7.html

I think they are looking for a roundup comparison along the lines of: 10 Radeon R9 270 And 270X Boards, Reviewed. Unfortunately not a lot of review sites do very many of these kinds of comparisons.
I think mostly the manufactures don't want to show that when you pay an extra $80 for that slightly overclocked card you are only getting 0.021% more performance.

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Yes Hal, that's what I had in mind and I understand and agree with your conclusions. We have to do the digging ourselves. Thanks