ok so i put some time into building this pc it has the asus crossfire-z amd 9590 fx 8 core cpu with liquid cooling that comes with it 32 gigs of ram 1800 mhz and sappire r9 290x card and its all ran by and eva 750w psu , my questing is ...is my psu not handleing all the hardware or is my card faulty, did extensive testing on cpu and furmark tests awell as running heaven on extreme and my card doesnt seem to fail other then when i play a game on ultra or even good for that matter, im completely stumped. someone please help me lol