In our final part of our look at three different takes upon the HD7950, we look at the Sapphire offering.Sapphire have long provided us with some of the best variants of the Radeon cards and the HD7950 Overclock Edition is no exception. A huge heat-sink bristling with heatpipes should ensure it remains cool no matter the loading, and an out of the box 900MHz GPU core speed will help it fit in with the plug and forget models.So rather than repeat things you already know, let's get on and look at it.