You haven't yet mentioned of your PSU or of your other PC specs. Without knowing of that, we can't be sure if it'll be too much for it to handle. The card is fairly old, so a good replacement for it would be a HD 6770. It offers a bit more performance, but for little power. It costs around $100. Other than that, you could look into a HD 7750 which consumes even less power than a HD 6770, and it should be fine for a good 300-350W PSU.