I'm gonna build a pc, the graphics card is an XFX Radeon 6970 and the power supply is a cooler master 750w. Im new to this and I dont want to buy a cable online and have it be the wrong one
You don't need to buy any special cable for it. ...
Well, you really shouldn't build a PC if you don't know what you are doing.
If you are asking this, don't build a pc, keep learning on google and youtube. You dont need a special cable, it comes with the power supple, and the cables are for extra power for the graphics chip (pci express slot cannot supply enough power so it needs those cables to supplement it)