First post here, just wanted to say thanks for a great community... Currently running a pair of 280x windforces, which are great. I want to however, try and get a third card for PhysX, and I think I will need a single slot solution, due to space. I've found some GT 630 / GT 240 on ebay, but I don't think they'd do the job... What would be the best card for this? Games would primarily be Borderlands 2 / Metro If I did go a dual slot, what would also be a suitable card, without breaking the bank (just thinking I may be able to sneak it in there).