well you need to upgrade your psu to about 500 watt i believe anyone correct me if im wrong but i believe you need a 500 watt at least to run that gpu
I do appreciate the answer I decided to get a 650 watt psu from newegg as well as the 550ti 2gb graphics card. From what I read the graphics card takes approximately 250 watts while it is running and approximately 150 watts while its idle. On the other hand I could have gone with a 500 watt psu and still seen good results but I wanted to go with 650 watts just to be safe. Again, thanks for the help and I am glad you told me about this otherwise I would have been out of luck.