I don't want to upgrade my power supply, so what is the best video card for 250 watts psu? i currently have the HP P7-1037cb computer i am currently using radeon hd 4200 gpu currently and i want something that can perform better! i am trying to play GTA 4 but the Radeon HD 4200 can't handle it. Should I buy a new psu or is there be a better video card out there for 250watts psu? I have one pci-e x16 slot available for a dedicated video card.