PC not coming back on from display sleep mode

CooLWoLF

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Lately my PC randomly does not come back on from display sleep mode. The PC itself is not in sleep or hibernate yet, its just the display turned off after 10 minutes of idling. Any ideas? Is this a graphics crash of some sort? It never crashes any other time. I have no other problems besides this; I frequently play cpu/gpu intensive games like BF3 and SC2 and never have a problem. System components are in my signature.