I've been advised for a decent upgrade to buy a 6870 which i was about to do but then I was told I need 2 6 pin connectors on the psu. I've had a look at my psu and it would appear to only have 1. Is there an adaptor i could use to be able to have the 2 connectors or would i have to replace the psu aswell?? Or is there a card that is still going to be a decent upgrade from a 4800 series (not sure of exact model) that only uses one connector??