I have a GTX 590 that is overheating pretty badly and needs its thermal paste to be replaced. In the meantime, I disabled SLI in the hopes of lowering the cards temperature, but some games like SC2 and Dota 2 are still pushing the card too much, making it reach 99C and causing it to underclock itself to avoid overheating, causing me lag. When I disable SLI, it always uses GPU 2 as the lone GPU. I'm thinking the problem might be with the paste on that one, and GPU 1 might actually be okay and usable. Only, I'm not sure how to make it use GPU 1 in place of GPU 2 when SLI is disabled on this card. Is that possible, if so, how can I do it?