Hello, I'm thinking of getting MSI N550GTX-Ti Cyclone OC GeForce GTX 550 Ti (Fermi) 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP Ready card and my power supply may not be up to par. I have 450 watt PS and it has single 6 pin connector. This card has the same. Will this combo work? Cannot seem to find the info anywhere what the card requires, im hoping this will be an easy question for someone, thanks.