I have 2 of these in slus in a system with the amd phenom ii x6 1100t and 24gig of hyperx ddr3 1600 ram and they be hard to beat . I have not run the 680 's yet and plan to wait till the stutter issue with v-sink be line out befor puting over $ 1000.00 into 2 more card . I only run evga video card and they have never let I down . these card run cool around 29c to 31c at idle and have not go over 55c to 60c under gaming load as the room temp go up and down . they be large and do need alot of room in you case . they take 2\/8 pin and 1\/6 pin each for power to the card . I run the xfx pro1250 power supply and it run these card well and have plenty power conection to run the 2 ulta gtx580 's . I have the inwin dragon rider pc case and with the side fan on these card just fit with no room to spare . I would think alot of mid tower case would have issue with this card as far as room to fit go . I run the card on a gigbyte 990 motherboard and it have alot of room between the pcie slot for good airflow . if you pcie slot be close together you may run into mount issue with 2 card they be large and wide . with the 2 card I can run any game or sim I have with all set max out at 60fp to 120fp . some of the flight sim I run have very high aa and af -lrb- 8\/x to 16\/x -rrb- setting but these card still run at 60fp or better with very few drop ever . most card like the gtx560tus 2gb card or the gtx570 1.5 gb card can not hold even 60fp at these high aa and af setting . they drop to 40fp and lower at time and you can tell when this happen it will cause a stutter at time . right now for the money and no issue in any game or sim I have not run a better super high performance video card . when the evga gtx680 's and the gtx670 's get line out I think they will give better performance in some but not all game and sim . from what I have see with these card they will be hard to beat gaming .