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Graphic adapter disappeared

Forum Graphic & Displays : Nvidia - Graphic adapter disappeared

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I am having the same problem. 2 X EVGA GTX260 were working fine till last night. Power this morning, and one card disappeared. The 3 monitors power up, but then it says no signal. so now only card is seen in device manager. Also, the resolution went down. 2 of the 3 monitors are in stanby, so I am pretty sure the graphic card is fine. PSU is 1000 watt , new PC HPVoodooDNA. I think it's something with windows 7.

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What I would do to confirm both cards are good is to try each alone (as in put in the primary slot and physically remove the other). You could also try reseating the cards. I had a similar thing happen a few years ago to my SLI rig, and it turned out a motherboard component had gone bad, but it did not affect the PC otherwise. What type of PC is it?

------------------------------ New Build : Intel Core i5 750 > Gigabyte GA-P55-UD4P > 2x2GB GSkill 1600MHz CL7 1.65V > Samsung Spinpoint F3 1TB >
Antec 300 Illusion > Asus 4850 512MB w/AM Cooler > Corsair 650HX > CM Hyper 212 Plus > Other: PII 940/Gigabyte 790GX/4850 1G

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Graphic adapter disappeared

Forum Graphic & Displays : Nvidia - Graphic adapter disappeared