SO I installed a chip in my brother's xbox, plus a 300gb hdd.... everything was fine until he upgraded the IDE cable - then the system hung. After replacing the cable with an original, it still hung, and eventually a cap on the MOBO blew up and caught fire. So I modded an extra box I had and setup my old 60gb in it - no issues. But the system hangs with the 300gb. I hooked it up to a pc and it was recognised, I activated it and formatted it. Hook it up to the box - hang (at the X logo screen always.) Also, I just got a 400gb seagate barracuda, same thing (haven't seen if a PC will see it yet) Anyone come across this and know how to fix the issue? I'd really hate to have a total of 700gb's sittin around as paperweights... Thanks!