Hello, can anyone tell me if the Radeon 7750 needs to be connected to the power supply with a 6-pin or 8-pin? I've been having troubles where I'd insert the card into its place and close everything up along with connecting everything. Whenever I try to install the driver for the card it gets an error where it cant find it. I'm not to sure, but I think the card isn't powering up or something so that's why it cant find it. Help me?