Damaged cpu?

[unlikeablePorpoise]

Last week my computer stopped POSTing. I pulled all the cards, drives,
etc and tried to boot the sytem with just cpu,ram,PCI video, and
mainboard to no avail. So, thinking it was the motherboard, I pulled
out the cpu (pentium 4 northwood 2.4GHz) and popped it into a known
working system. The chip worked but ran slow in the other mainboard and
the BIOS reported a speed of only 1.2GHz (should be 2.4 GHz). So I know
the original motherboard is fried, but my question is did it "partially
destroy" my cpu (as it still works in another system, but is terribly
slow)?

specs:
Abit IS7 mobo
Enermax 460 W PSU
2x512 Geil RAM dual channel
Pentium 4 Northwood hyperthread CPU 2.4GHz

thanks,

Sarah

 

[beenthere]

Last week my computer stopped POSTing. I pulled all the cards, drives,
etc and tried to boot the sytem with just cpu,ram,PCI video, and
mainboard to no avail. So, thinking it was the motherboard, I pulled
out the cpu (pentium 4 northwood 2.4GHz) and popped it into a known
working system. The chip worked but ran slow in the other mainboard and
the BIOS reported a speed of only 1.2GHz (should be 2.4 GHz). So I know
the original motherboard is fried, but my question is did it "partially
destroy" my cpu (as it still works in another system, but is terribly
slow)?

specs:
Abit IS7 mobo
Enermax 460 W PSU
2x512 Geil RAM dual channel
Pentium 4 Northwood hyperthread CPU 2.4GHz

It`s not likely that you`ve damaged the CPU.
Probably the speed of the other board wasn`t set right.

 

[philo]

It`s not likely that you`ve damaged the CPU.
Probably the speed of the other board wasn`t set right.

I agree...
the second machine either does not support a faster cpu...
or the bios needs to be reset...

the chances of a cpu partially failing are pretty close to zero

 

[unlikeablePorpoise]

Thanks for your replies. I tried to reset the CPU speed in the BIOS of
the other computer, but it won't let me change it (its "greyed out").
I guess that the chip is ok then.

Now I have to find a socket 478 motherboard...any suggestions? Will
the newer socket 478 Prescott/Celeron D boards support the older
Northwood CPUs?

Thanks,

Sarah

 

[DaveW]

CPU's are almost always "completely work/completely do not work" devices.
The problem probably lies elsewhere.

 

[philo]

Thanks for your replies. I tried to reset the CPU speed in the BIOS of
the other computer, but it won't let me change it (its "greyed out").
I guess that the chip is ok then.

Now I have to find a socket 478 motherboard...any suggestions? Will
the newer socket 478 Prescott/Celeron D boards support the older
Northwood CPUs?

I don't know about the newer boards...but maybe you can find something
similar on ebay.

If you buy from someone with a high rating and a no DOA warranty...
you should be OK

 

[Paul]

Last week my computer stopped POSTing. I pulled all the cards, drives,
etc and tried to boot the sytem with just cpu,ram,PCI video, and
mainboard to no avail. So, thinking it was the motherboard, I pulled
out the cpu (pentium 4 northwood 2.4GHz) and popped it into a known
working system. The chip worked but ran slow in the other mainboard and
the BIOS reported a speed of only 1.2GHz (should be 2.4 GHz). So I know
the original motherboard is fried, but my question is did it "partially
destroy" my cpu (as it still works in another system, but is terribly
slow)?

specs:
Abit IS7 mobo
Enermax 460 W PSU
2x512 Geil RAM dual channel
Pentium 4 Northwood hyperthread CPU 2.4GHz

thanks,

Sarah

When you have the heatsink removed from the top of the processor,
could you record the numbers and letters on the top of the
processor ? That might allow positively identifying what
kind of processor you have in your hand. (Maybe there is a
sticker on the box and you can get the number there.) You can
look up the SSPEC (SLxxx) code here:

http://processorfinder.intel.com

For example, a P4 box next to my desk, has this printed on the
sticker

BXM80532GC1500DSL5ZX

and the SSPEC in that case is "SL5ZX".

I have a theory as to why it is running at half speed,
but need to know the part number of the processor to be
sure.

Your IS7 motherboard has an 865PE chipset, and that is
capable of running at FSB800, so that doesn't seem to be
the problem.

Paul

 

[unlikeablePorpoise]

Paul,

I looked on the chip and the number is SL6WF. Just want to point out
that the chip runs slow in another motherboard, not the Abit IS7. It
was running just fine in the IS7 before that board suddenly died. Here
is the link from Intel:

http://processorfinder.intel.com/details.aspx?sSpec=SL6WF

Thanks,

Sarah

 

[Paul]

Paul,

I looked on the chip and the number is SL6WF. Just want to point out
that the chip runs slow in another motherboard, not the Abit IS7. It
was running just fine in the IS7 before that board suddenly died. Here
is the link from Intel:

http://processorfinder.intel.com/details.aspx?sSpec=SL6WF

Thanks,

Sarah

OK, I was checking to see if the processor was a Mobile or not.

It looks to be a normal 2.4C (FSB800) processor. The Mobile
doesn't have Hyperthreading, and I wanted to be sure, by
checking the SSPEC.

The motherboard you plugged it to, could be limited to
FSB533 or FSB400. Older motherboards might not run at
FSB800. It could be that an older motherboard would
select FSB400 as the default speed, when presented with
an FSB800 processor. That would account for the 1/2 speed
result. If you get another FSB800 motherboard, like your IS7
and its 865PE chipset, that should run it at the normal 2.4GHz.

You see, the Mobile P4's have a default of 12x100 when
plugged into a desktop motherboard. So when I saw 1200,
my first theory was you had a Mobile plugged to a
Desktop chipset. But you have a 2.4C Northwood, running
with a half speed FSB instead. If the BIOS had a clock
adjustment, you could raise the clock a bit, and there
is at least one motherboard (P4PE) where you can just
barely take it from its normal FSB400/FSB533 level,
all the way to FSB799-FSB800. That one is a squeaker,
as it is right at the limit of the Northbridge.

Paul

 

[unlikeablePorpoise]

Paul,

I think youre absolutely right. The mobo is an Intel D845EBT and
is 533/400 FSB. Good job Paul.

Thanks,

Sarah