Hello, I'm thinking about getting an upgrade from my old (well fairly new) 7750 2GB to a Sapphire 7850 2GB - http://www.amazon.co.uk/Sapphire-11200-14-20G-Card-HD7850-GDDR5/dp/B008HV63F0/ref=sr_1_1?ie=UTF8&qid=1355248612&sr=8-1 I've checked so that every thing works and is compatable. It's just for the upgrade, is it really worth it?