--You need a Better quality PSU.Get a Corsair 400CX or OCZ Modxstream 500W.
--LGA 775 won't give you future upgrade options.
Instead get an AMD 785 mobo with Phenom II X2 550 or Athlon II X4620.
--You'll need 4GB Ram for gaming.
If you wanna save some money get 500GB Samsung F3 Spinpoint HD.
Make these changes...........