ZOTAC GeForce GTX 580 AMP! Edition 1536 MB
 

ZOTAC's GeForce GTX 580 AMP! Edition comes at a massive core clock of 815 MHz. During our testing we also noticed that the card could overclock consistently higher than other reference designs, which seems to be thanks to a special binning process in the ZOTAC factory.

http://www.techpowerup.com/reviews/Z...80_Amp_Edition