would i be running the risk of getting that card with my psu or should i go with hd 4850 1gb. performance wise does gddr5 pose better performance than gddr3. For what i know the hd 4870 512mb is only 10 bucks more than the 4850 1gb but im unsure about whether 4870 would take too much power when under load and destroy my whole computer.If anything im not planning to use this PSU for more than 6 months.