I purchased a ENGTX580 card for my new build on the 31st of august, and after a week or two the display port failed and I was forced to use HDMI instead. Then, two weeks later, the card completely failed. When it worked, it worked wonderfully, although I never OC'd it or even put it under a heavy load. I RMA'd the card, and when it was returned the Display port worked again for two or three days, failed, then card was unable to be recognized after that (on any PCI-E slot). I RMA'd it again, received the card back two days ago with a non-functional Display Port, and now the card does not function at all. I suspect the card is faulty (it is the same graphics card, just "repaired") since it did perform slightly better after being returned from ASUS, but I am wondering if something else could be causing the problem. Sorry about the wall of text, and if it helps I have a HX1050 PSU and an ASROCK Z68 Extreme7 Gen3 MoBo, and all drivers are up to date.