I bought a Zotac GTX 660 Ti AMP edition in March of this year off of Newegg. A month after I received it, while playing RIFT and Defiance, my display would go blank for a few seconds then come back with significant FPS loss. If I minimized to my desktop for about ten seconds then went back to the game, everything would be back to normal. I requested an RMA from Zotac and sent the brand new card to them. They sent me a replacement a month later, and once received, I installed it. For the week that I had this replacement, 80% of the time when I restarted my computer, I would get the one long beep followed by three short beeps telling me that no video card was detected, as well as a solid red light from the VGA LED on the mother board. Contacted Zotac and received an RMA. I sent them the card, and they claim to have tested it and found no problems with the *refurbished* card, so they sent it back. Problem still occurs. If I start my computer, everything comes up fine. If I restart my computer for any reason (driver updates, windows updates, etc.) the beeps and light occur. If my computer were to go to sleep, the display won't wake up, but the computer itself does. I have a Zotac GTX 550 Ti that works perfectly fine whether it's starting, restarting, or sleeping. Not sure how to fix this issue, if it can be fixed at all. I updated the drivers for the card, and updated my BIOS per the opinion of the manufacturer of the mobo, Asus. Can anyone give any insight as to why this might be happening? Thanks, in advance.