Installer won't get by the video, I put a hard drive in with 7.6 and a VRAM SIMM (and without) and it still wouldn't boot, something about the enabler and video. I even put the 520 and each color classic enablers in there one by one no luck. If you got it to work I'm impressed. I tried for years. I could be to close to the problem. With the four I had 7.5.5 is all I could get going. Installed 7.6 in a 575 and transferred drive and motherboard over and boom bomb error at boot.