Help Please - Possible fried processor

After some advice here please - I think that I may have a problem with
my Athlon XP1900+ processor and I am needing some confirmation before
I go and fork out for another processor only to find out its a problem
with something else such as the mobo itself. I have a Jetway V333 DA
mobo with latest BIOS update and 1 Gb RAM (512 stick and 2x256Mb
Stick).
Machine details
Jetway V333 DA Mobo (VIA Chipset)
40Gb Primary
120Gb Sec
Memorex CD Rom Twelve MAXX
Matshita DVD RAM SW9581
Geforce 2 MX400 64Mb Video

I have XP Pro installed (with all patches) and every now and again
(more now than again!!) the machine reboots with no explanation (not
caused by blaster worm as its been patched) nothing in the system
logfile points to the problem although occasional dump info is written
but I've not really managed to pinpoint the problem - I have full dump
enabled but it doesn't always create a dump - rather like an IPL.
Where the dump is available I have used dumpchk to analyse those dumps
- but there is nothing glaringly obvious - just trap errors in
NTOSKRNL with same offset. I've run memtest86 with no errors and
windows memory diags - again with no errors. If I allow the machine to
boot with the L2 cache turned off the machine is more stable and lasts
longer before rebooting. I have changed the memory/power with no
change. Do these symptoms indicate a fried processor? I have tried
re-installing OS with minimal cards/addons (such as CD/DVD) but it
makes no odds. The normal running temp is 50-55 deg C. I know that
this is probably a long shot but any help would be really appreciated
as it is doing my head in!! Thanks

"Andy" <edinb1.TakeThisOut@yahoo.co.uk> wrote in message
news:b5be287d.0310272240.ce9137a@posting.google.com...
 > After some advice here please - I think that I may have a problem with
 > my Athlon XP1900+ processor and I am needing some confirmation before
 > I go and fork out for another processor only to find out its a problem
 > with something else such as the mobo itself. I have a Jetway V333 DA
 > mobo with latest BIOS update and 1 Gb RAM (512 stick and 2x256Mb
 > Stick).
 > Machine details
 > Jetway V333 DA Mobo (VIA Chipset)
 > 40Gb Primary
 > 120Gb Sec
 > Memorex CD Rom Twelve MAXX
 > Matshita DVD RAM SW9581
 > Geforce 2 MX400 64Mb Video
 >
 > I have XP Pro installed (with all patches) and every now and again
 > (more now than again!!) the machine reboots with no explanation (not
 > caused by blaster worm as its been patched) nothing in the system
 > logfile points to the problem although occasional dump info is written
 > but I've not really managed to pinpoint the problem - I have full dump
 > enabled but it doesn't always create a dump - rather like an IPL.
 > Where the dump is available I have used dumpchk to analyse those dumps
 > - but there is nothing glaringly obvious - just trap errors in
 > NTOSKRNL with same offset. I've run memtest86 with no errors and
 > windows memory diags - again with no errors. If I allow the machine to
 > boot with the L2 cache turned off the machine is more stable and lasts
 > longer before rebooting. I have changed the memory/power with no
 > change. Do these symptoms indicate a fried processor? I have tried
 > re-installing OS with minimal cards/addons (such as CD/DVD) but it
 > makes no odds. The normal running temp is 50-55 deg C. I know that
 > this is probably a long shot but any help would be really appreciated
 > as it is doing my head in!! Thanks

Definitely *not* the CPU, IMHO.
When CPU's fail, the normal symptom is no reaction to power at all. IOW,
dead.
I agree with rstlne, try the PC with only one stick of memory (preferably
the 512) and see if the instability goes away. Check your PSU and, if
possible, try a substitute. You've got a lot of "stuff" hung on that PSU.<!-- ~MESSAGE_AFTER~ -->