Hi! I have a friend that have a problem with his 2'nd GTX 760. He recently got both cards, but the second one wouldn't be found in Windows. So he tried only that card in the system, and no signal was found. Thought the card was faulty, so he got back to the store and they tested it and it worked perfect there. He then tried the card in his Brothers computer and it worked perfect there too. We have tried to reset BIOS, double checked if it was the right power cables he used, tried both slots on the Motherboard and that card wont work in his own computer. His brother have the same setup except the PSU and RAM. What could this be? His other 760 works perfect for him.