Fedora 12/13 unexpected shut down Please help !!!

[Onkar Mahajan]

I am doing kernel compilation on fedora 13
like this

$ make -j2 bzImage modules

Strangely, FC12 & FC13 running on AMD x86_64 machine
happen to halts uncleanly (as if power goes off ) in the midst
of compilation process.

I have been using this machine for compilation for over 2 years on
other distros such as debain, Suse, but such problem has never occured.

Is anybody familiar of such thing happening  in FC12/13 distros.

any configuration missing ??

or bug ?

Regards,
Onkar

PS :

on i386 machine - FC13 performs normally. but FC12 exhibits
this kind of problematic behavior.
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