Guys, lots of good ideas here. Unfortunately, none of the above has worked for me so far. I'm using a matrix chip with M7 bios and evox 3935 dashboard. XBox is a 1.0 with a Thomson drive. The game runs slow with the original DVD and with the HD backup done via DVD2XBox. I can reset NTSC/PAL etc. from within in the dashboard and PAL does change POP by making the screen roll but even then it plays slow and continues to play slow when I switch back to NTSC. I've tried the other suggestions (clearing out the cache files, checking the time within M$ dashboard, deleting the original POP profile, etc.) all to no avail. All my other games have run fine with the MOD chip whether from the original disc or after backing up to hd (KOTOR, Sp Cell, Madden 04, JKII, Morrowind, LOTR:TTT&ROTK, Crim Skies, Links 04). Any other ideas?