Hibernation is not system-dependent ... it is strictly an OS function, and as firebird pointed out, it can be enabled and disabled.  Although I think hibernation is as valuable on a desktop as on a laptop, on a desktop hibernation is disabled by default.  That said, there are times when Windows simply cannot hibernate - like if the system has >4GB of RAM, which the T7500 can easily do: support.microsoft.com/.../888575
Hi, I've comes across a T7500 Precision with XP on it and I've been asked why there is no "Hibernate" on XP SP3. As I've never come across this machine before (and don't have access to another one), can someone please help me out? Many thanks, Cliff 
T7500 - No "Hibernate" Tab in Windows XP SP3