I was able to flash my x800 pro (non-VIVO) to x800 xt speeds but I wasn't able to unlock any pipes though, I also added a Arctic Cooling ATI Silencer 5 to the card and installed it into my system. I have a Dell Dimension 8400 MCE 1 gig RAM 3.2 ghz P4 w/HT. How much will I be able to over clock on memory speeds and core speeds with this setup? Right now I have the speeds at 500mhz. Any suggestions/comments are welcome Mike