Overclocking
Can the GHz Edition go further? Yep, a little bit. We were only able to add another 40MHz to the core before running into stability issues, but the frame buffer proved willing at an effective 7,600MHz.
The fastest just got that little bit faster, though, this arguably isn't a card for overclockers - it's for those who want maximum out-the-box performance. Enthusiast users will note that cheaper cards are readily available and can be manually overclocked to similar levels.