System Too Hot?

[needin4mation]

Hi, I have an ASUS A7v8X-X, amd 2500.

About a month or so ago my computer got struck by lightning. It came
in through the cable modem and blew up the modem and my NIC card on the
Motherboard (same motherboard model).

Back then, the CPU would run about 39C - 43C. Now, a month later, the
new motherboard (same kind though) and the CPU runs at 51C.

Could the CPU have been damaged or something else that would make it
run hot? The power supply?

my PS values are:

+12 - 11.712
+5 - 4.999
+3.3 - 3.248
Vcore - 1.536

Asus A7V8X-X
CPU fan about 5800k
AMD 2500XP
ATI 7500 Video Card
1GB Corsair Value Select 512x2
350 Sparkle Power Supply
two hard drives
cd and dvd
gameboy antec case with two fans front and back working

With the exception of the motherboard, all these parts were in the
computer when the bolt hit the cable modem.

Thank you for any help.

 

[RBM]

It may be the temperature sensors on the new board are just reading
differently, but you could try reseating the cpu heat sink

 

[philo]

Hi, I have an ASUS A7v8X-X, amd 2500.

About a month or so ago my computer got struck by lightning. It came
in through the cable modem and blew up the modem and my NIC card on the
Motherboard (same motherboard model).

Back then, the CPU would run about 39C - 43C. Now, a month later, the
new motherboard (same kind though) and the CPU runs at 51C.

<snip>

did you clean the old heatsink compound off well
then use new?

 

[kony]

Hi, I have an ASUS A7v8X-X, amd 2500.

About a month or so ago my computer got struck by lightning. It came
in through the cable modem and blew up the modem and my NIC card on the
Motherboard (same motherboard model).

Back then, the CPU would run about 39C - 43C. Now, a month later, the
new motherboard (same kind though) and the CPU runs at 51C.

Could the CPU have been damaged or something else that would make it
run hot? The power supply?

No, neither of these would make it run hotter. They work or
don't.

my PS values are:

+12 - 11.712
+5 - 4.999
+3.3 - 3.248
Vcore - 1.536

Vcore looks low unless this is a mobile chip... or maybe I'm
wrong, I thought the default for a regular Barton was higher
than 1.5-1.55V. Regardless, if it's running ok don't change
it, a lower voltage would make it run cooler, not hotter.

Asus A7V8X-X
CPU fan about 5800k
AMD 2500XP
ATI 7500 Video Card
1GB Corsair Value Select 512x2
350 Sparkle Power Supply
two hard drives
cd and dvd
gameboy antec case with two fans front and back working

With the exception of the motherboard, all these parts were in the
computer when the bolt hit the cable modem.

Thank you for any help.

It's most likely one of the common things, dust buildup or
higher ambient (case or room) temp. Another possibility is
that your new board uses different bios version than the
old- Different bios may report temp differently.

51C is not too hot, why spend time on this unless it later
gets hotter towards instability?

 

[General Schvantzkoph]

<snip>

did you clean the old heatsink compound off well
then use new?

Philo is pointing you in the right direction. When you moved the CPU to
the new board you probably didn't clean off the old compound. Clean off
the old compound with a solvent and then use fresh compound. Arctic Silver
will reduce the temperature by an extra 5C over ordinary compound.

 

[Shep©]

Hi, I have an ASUS A7v8X-X, amd 2500.

About a month or so ago my computer got struck by lightning. It came
in through the cable modem and blew up the modem and my NIC card on the
Motherboard (same motherboard model).

Back then, the CPU would run about 39C - 43C. Now, a month later, the
new motherboard (same kind though) and the CPU runs at 51C.

51 Deg C in nothing to worry about and well within spec.Remember also
that ambient temp of the location is a factor and the airflow around
the outside of the box e.g don't clog up the back of the box.You have
nothing to worry abut IMHO.
HTH



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[needin4mation]

How do I clean off the old compound? I don't want the damage the chip.
Thanks.

 

[terry_b17]

hi,
is the heatsink/fan installed with thermal compound or tape ? in
moving the processor to the new board the compound or tape may have
been disturbed .check out the guide at
http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_9342,00.html
hope this helps ,
terry

 

[kony]

How do I clean off the old compound? I don't want the damage the chip.
Thanks.

If it won't wipe off with a dry paper towel then try
alcohol... if it doesn't then come off VERY easy it is
petroleum based thermal material and needs a petroluem-based
solvent (take your pick, you probably have "something"
around the house like WD-40 or Goo-Gone or Gasoline or
Lestoil or ???).

Arctic Silver does not usually make 5C difference... maybe
on a very unflat heatsink but most often it's a couple
degrees if that.

 

[Guest]

How do I clean off the old compound? I don't want the
damage the chip.

Just wiping the compound off with a paper towel is good enough, unless
you're going to replace it with thermal tape or glue, in which case
alcohol is the safest solvent to use because it doesn't harm any of the
plastics.

To see how any chemical reacts with common materials, see
www.coleparmer.com/techinfo/chemcomp.asp

 

[kony]

Just wiping the compound off with a paper towel is good enough, unless
you're going to replace it with thermal tape or glue, in which case
alcohol is the safest solvent to use because it doesn't harm any of the
plastics.

To see how any chemical reacts with common materials, see
www.coleparmer.com/techinfo/chemcomp.asp

That's a handy link but what plastics do you anticipate
encountering on a CPU? No solvent should be left wet on the
CPU while reinstalling it so the primary issues would tend
to be what interaction there is with what is actually in
contact with the solvent. Not sure exactly what the top
coating is on a CPU, is that lacquer or what specific
formulation? Certainly lacquer can react with some things
but having used petroluem solvents with the CPUs suffereing
no ill effects, it appears any potential plastic compounds
in a "lacquer" are resistant enough for briefly wiping.

Heat spreaders are still nickel-plated and bonded with
silicone rubber AFAIK.

 

[Guest]

On 11 Apr 2005 06:04:44 -0700, (e-mail address removed)
wrote:

That's a handy link but what plastics do you anticipate
encountering on a CPU? No solvent should be left wet on the
CPU while reinstalling it so the primary issues would tend
to be what interaction there is with what is actually in
contact with the solvent. Not sure exactly what the top
coating is on a CPU, is that lacquer or what specific
formulation? Certainly lacquer can react with some things
but having used petroluem solvents with the CPUs suffereing
no ill effects, it appears any potential plastic compounds
in a "lacquer" are resistant enough for briefly wiping.

Heat spreaders are still nickel-plated and bonded with
silicone rubber AFAIK.

I don't know what the coating is on CPUs, but if it's not lacquer, then
it's probably either enamel, polyurethane, or epoxy paint. Chip
packages are usually epoxy resin, the CPU socket polyester, the
sleeving on electrolytic capacitors vinyl (PVC). Some other hard
plastics are PVC, polypropylene, polycarbonate, or polyester, but I
haven't seen much ABS (material used for case fronts). Alcohol (ethyl,
isopropyl) don't seem to affect any of these when used for cleaning
purposes, and only ABS, PVC, and polycarbonate are easily affected by
solvents like lacquer thinner and MEK.

 

[kony]

I don't know what the coating is on CPUs, but if it's not lacquer, then
it's probably either enamel, polyurethane, or epoxy paint. Chip
packages are usually epoxy resin, the CPU socket polyester, the
sleeving on electrolytic capacitors vinyl (PVC). Some other hard
plastics are PVC, polypropylene, polycarbonate, or polyester, but I
haven't seen much ABS (material used for case fronts). Alcohol (ethyl,
isopropyl) don't seem to affect any of these when used for cleaning
purposes, and only ABS, PVC, and polycarbonate are easily affected by
solvents like lacquer thinner and MEK.

Something else to consider is that the original compound IS
petroluem based... if that solvent were a problem on a CPU
I'd think they wouldn't use it. Alcohol IS a better choice
when it works, maybe just to rule out the unoknown as I
can't see any competent installer getting it anywhere but on
the CPU, _BUT_ alcohol simply will not remove some thermal
pads.