Sapphire HD 7970 6GB Vapor-X GHZ Edition

Overclockers Club has the Sapphire HD 7970 6GB Vapor-X GHZ Edition on the grill today. This is the 6GB version of the card we review here earlier this week. The Vapor-X cooling solution does allow for increased overclocking margins to a point where the core is only going to give up what it can. Voltage tuning helps, but you reach a point where voltage no longer helps drive a core clock speed increase. This particular HD 7970 6GB Vapor-X GHz Edition sample was able to reach in excess of 1200MHz on the core and 1700MHz+ in some tests but would fail at others.