I bought this graphics card tonight, and went to install it on my new Dell PC and while the card itself is powered by a 6-pin, I don't have one on my power supply. Is there an adapter I can use? Or will I have to go buy a new power supply for a NEW computer..?
Depends - what are your system specs? Impossible for people to help you when we don't even know what hardware you're running. Don't ruin your new graphics card by putting it ; 1. On a power supply without enough wattage to handle it, and 2. On a power supply that didn't come with cables for a graphics card. Chances are you should invest in a bigger power supply. I would recommend at least 550w for a GTX550Ti. I recommend Corsair and XFX power supplies, as well as Seasonic.