Monitor flashes green because of GPU

[redxsoxx34]

Hello, I recently built a computer for Christmas. Today I first booted it up and the fans were spinning and everything, but the monitor was flashing green. I was not able to see anything on the screen, just the monitor blinking green. The processor is an i5 3570k, the GPU is a Sapphire 7950. I tried taking the GPU out and it worked, but when I tried a different GPU the screen was still blinking green. The cable I was using to connect the monitor to the GPU was an HDMI cable. I tried it on both GPU's, so will I have to buy a DVI cable , install the drivers and then be able to use an HDMI cable? Thanks!

 

[popatim]

Your problem is not the cable type. Please tell us the make and model number of the various components of your pc. Esp the PSU and motherbd.

 

[redxsoxx34]

Your problem is not the cable type. Please tell us the make and model number of the various components of your pc. Esp the PSU and motherbd.

Here are the components:

CPU: i5 3570k
GPU: Sapphire Radeon 7950
Motherboard: ASRock Z75 Extreme3
RAM: Corsair Vengeance 16gb 1600
PSU: Antec High Current Gamer M 620w

Thanks!