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