EVGA GTX 650 Ti SSC and HP H8-1455 Compatibility (Black Screen)

Hardware
HP H8-1455
Win 8 64-bit
Black Screen (issue)
When installing EVGA GTX 650 ti SSC
Attempting to install an EVGA GTX 650 ti SSC into a HP h8-1455 that has a 460w Power Supply.  I've uninstalled the AMD 7570 Drivers and disabled the secure boot on the motherboard (EVGA support).  I'm leaning toward this being either a bios related problem or not enough power through the 6-pin connector.  I've tried two different video cards same issue.
Any other ideas?
This question was solved.
View Solution.

MV, welcome to the forum.
I would be inclined to agree with your suggestion that it is an insufficient power problem.  All PSU's are not made the same.  The GTX versions require alot of raw power to operate properly.  The 460W PSU in the computer is made for the components installed at the factory with not much room for upgrading.
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