I have a Sony Vaio model VGC-RA820G. I wanted to upgrade my video card and purchased the GeForce 8800GTS. My current power supply, did not meet the requirements needed for the 8800 so it needed to be upgraded. Unfortunately, the power supply is proprietary, so no aftermarket units will work in my system. I then called Sony's part department (3 times to ensure I was getting correct information), and they said that Sony never made any other power supply's for my model. In other words, my $400 Video card cannot be used in my computer, period. My question is this. First off, do they make external power supply's that would "boost" my current power supply? One of the guys at Best Buy's "Geek Squad" said that I could buy one from Ebay, but to honest, I'm not sure that they even exist. My other question is, if I were to buy a different tower, is there a good chance that most of my current internal components would NOT fit? Because I'm sure that the power supply is not the only thing "proprietary" in my system. I'm grasping for straws at this point, but if there is anything I can do to salvage this situation, I'd love to know what it is. Thank you in advance!