Until recently, I realized that my video card was kinda bleh. It's a GeForce 5500 MX overclocked 256mb. Now that I have a job, I thought to myself "hey, i can get a new video card " when I was looking through the video cards, basically all of em require a 300-400w power supply. Mine's 250w. According to people at best buy, My HP Pavilion a520n has a certain sized powersupply that cant be replaced. Could anyone give me a suggestion on what I could do? Thanks.