PC not posting with VisionTek HD7970

[Ryouko]

I had a PowerColor PCS+ HD7970 OC Edition. I started experiencing some Grey screen of death problems Intermittently. I'm currently trying to replace it with a VisionTek HD 7970.

I installed the VisionTek HD7970 and PC will not Post. I got a 2nd VisionTek HD7970 thinking my card was DOA. Same no posting problem.

I doubt that both cards were DOA. I plug in my PowerColor PCS+ and I boot right up.

Here is what I have tried so far. Tried with fresh drivers already installed, no drivers installed and driversweepered, tried in every PCIe slot, cleared cmos with button, removed CMOS battery for 30 min and also flashed to most up to date Bios

Any Ideas?

Computer Specs as follows:
CPU: AMD FX-8150 Eight Core 3.6 GHz
Memory: AMD PC3 1,600MHz 16GB PE
GPU: PowerColor PCS+ Radeon HD 7970 3GB (trying to replace with VisionTek HD7970 3GB)
Motherboard: SAPPHIRE PURE Black 990FX
Case: CM Storm Trooper
PSU: CM Silent Pro Hybrid 1050 Watts
OS: Windows 7 Home Premium 64bit

 

[ASHISH65]

1)go to bios settings - set primary display device to PEG OR PCI E

1)Update your bios to latest

 

[Ryouko]

Primary Display Device is set up, Already updated BIOS to latest. I'm at a lost besides saying both cards are DOA. I plug the PowerColor PCS+ Radeon HD 7970 back in and PC boots right up. Swap it out with the VisionTek and nothing.