I recently ordered an MSI 990FXA-GD65 motherboard, and it came in today and when I looked at it, it has a 6 Pin and an 8 Pin power connector, thing is my PSU has a 6 pin and a 6 + 2 pin, and my GPU has a 6 pin on it, so I can only do one of the power connectors, do I need to buy a new PSU? If so, what's a good one that will work for under $80?