Done some more tweaking. I dismantled the cooling on the card to see what could be tweaked. The gains aren't anything substantial but rather vastly improved stability for the card. Anyway, people with Sapphire cards take the HSF off and remove the black heatsink. You will notice where the heatsink screws in thre are a couple standoffs, sand these down until proper contact is made with the ICs with thermal paste and not the naff thermal pad. Doing this simple mod allowed me to run 1000MHz on the GPU in Heaven 2.1 for about 5 mins where before this adjustment it would only run for about 30 seconds. As I said, this is a stability over a performance mod