GeForce GTX 580 CUHC (Classified Ultra Hydro Copper) 3GB is a special edition of the powerful GeForce GTX 580. See the standard version for more information about it.
The differences include increased memory and core clocks, from 4008MHz to 4212MHz and from 772MHz to 900MHz, respectively. It also includes a better cooling system to reduce the heat that resulted from the huge overclocking. The amount of video memory was doubled and is quite handy, if gaming at extreme resolutions with image improving techniques.
Benchmarks indicate a performance boost of about 7% when compared to the standard GeForce GTX 580.
All games, including demanding one's, will run on the highest settings.