Haven't managed to find this problem with the search engine... I just put a new hard drive in my xbox , Samsung Model SP1604N. I'm using the newest X2 bios off of a Xenium Ice chip, and formatted the hard drive with the Xenium OS. The hard drive locked fine. However, with the new hard drive, some games run, some games don't. For example, Burnout 3 will lock on the load screen, and Need For Speed Underground 2 locks after you select a profile. These games will lock in the same place either when playing off the hard drive OR when playing off the original game disk. If I put the original HDD back in, these games run fine. I recently got 2 of these hard drives, so I tried them both, and got the same result. Any ideas?