I plan to upgrade the GPU in a Windows Computer I have (like the G3 B&W It's PCI Only) The current GPU In it is a nVIDIA GeForce FX 5500. Bought it YEARS ago to upgrade a previous PCI-Only desktop. Since I will be getting a better GPU for this computer, I wanted to flash this 5500 to work on my MDD. What kind of Mac ROM would I use? The GPU I'll be upgrading to is a JATON Video-339PCI-HLX Radeon HD 5450 512MB 64-Bit DDR3 PCI HDCP Video Card. How does this compare to the 5500 or a PCI 6200? If it matters any, This computer is a stock HP Pavillion a824n. It also has a SoundBlaster Audigy SE (Probably not needed but I have 3 of them so I figured I might as well use one of 'em).