AN7 System Stops

My system spontaneously and instantly powers off and restarts. There
is no set pattern for this happening. I think I hear a click coming
from my computer each time this happens.
Here's my system specs:
OS:Windows 2000 (latest updates)
CPU: AMD Athlon XP 2700+ (2.17 GHz)
RAM: 2x 512MB PC2700 Kingston HyperX
MOBO: ABIT AN7
Graphics: Sapphire Radeon 9600 "Atlantis" 128 MB
HD: IDE Wester Digital 80 gig 8mb cache 7200 rpm
DVD/CD-RW: Toshiba SDR 1512

I have tried different graphics cards and WIN XP but the same thing
happens. Have an identical computer with a different graphics card
and only 512 mb RAM. Runs perfectly. However I have noticed that the
messed up system takes longer to identify IDE devices when booting up.

Any ideas?

Have this happening once in a while when I push my system to the max. If I
keep everything stock, never stops. Might be software to. Some of my
software close automaticaly for no reasons also when my system is
overclocked.
hope this helps out.
"Zatarra" <bjcole83 RemoveThis @yahoo.com> wrote in message
news:57941f7b.0405291511.5145e679@posting.google.com...
 > My system spontaneously and instantly powers off and restarts. There
 > is no set pattern for this happening. I think I hear a click coming
 > from my computer each time this happens.
 > Here's my system specs:
 > OS:Windows 2000 (latest updates)
 > CPU: AMD Athlon XP 2700+ (2.17 GHz)
 > RAM: 2x 512MB PC2700 Kingston HyperX
 > MOBO: ABIT AN7
 > Graphics: Sapphire Radeon 9600 "Atlantis" 128 MB
 > HD: IDE Wester Digital 80 gig 8mb cache 7200 rpm
 > DVD/CD-RW: Toshiba SDR 1512
 >
 > I have tried different graphics cards and WIN XP but the same thing
 > happens. Have an identical computer with a different graphics card
 > and only 512 mb RAM. Runs perfectly. However I have noticed that the
 > messed up system takes longer to identify IDE devices when booting up.
 >
 > Any ideas?<!-- ~MESSAGE_AFTER~ -->