New HP h8-1414 wont post with new gpu

mgoad22

Honorable
Jan 9, 2013
1
0
10,510
Hello,
I purchased the above mentioned desktop yesterday, it worked fine out of box for a few hours then I took out the oem gpu and psu, installed a evga gtx 660 and a rocketfish 550w psu from my old tower. Other than the horrible cramp the card makes inside, it will not allow the pc to post. (Repeating long beeps) I tried the stock gpu with my 550w and it worked fine. Could it be a power issue or maybe an issue with the amd mobo/gpu and the nvida card? I'm stuck!! Any thoughts?
 

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