Attaching 80mm fan to original Athlon 2500 HSF

I'm looking for feedback on the idea of attaching a 80mm fan onto the
original HSF (Ajigo MF035-032) that came with my Athlon 2500 in order to get
the full load temp down from 72C to around 60C. The original 60mm fan is
rated at only 18.5CFM, which seems quite low. I could stick on a Vantec
Stealth 80mm fan that runs quiter and pumps 27CFM, which is about 50% extra
air flow. Is it possible that this would make enough difference to get me
down about 10C? Or should I look for a better heat sink also? In case it
matters, my case is 24C.

If you want more info about my reasoning on all of this read on ...

I currently have a Asus A7N8X Deluxe Rev. 2.0 with a Athlon XP 2500+ running
at 200Mhz * 9.5 with the stock HSF. Unfortunately I'm already hitting temps
of 72C on the diode (at full load), which I'm not comfortable with. Since I
don't like noise, and I don't want to overclock anymore than right now, I'm
not looking for a super powerfull HSF. I'm also one of those people you
worries about the warranty, etc. and would rather stick to the manufacturers
suggestions on what can be attached to the CPU. This means that I don't
want to go over the recommened 300g weight of the HSF and I would like to
stick with using a thermal pad instead of paste especially due to the danger
of thermal pump out.

Since the original heat sink is very close to 300g and is made of a copper
base with aluminum fins bonded to it, I'm thinking that I'm probably not
going to find a much better heatsink without going over the weight limit.
Am I correct in assuming that weight to a large extent governs how good a
heat sink can be (exluding poor designs, etc.).

So if I'm not going to find a much better heatsink for my needs, it only
makes sense that I simply change the fan, instead of getting a whole new
combination and wasting money.

Thank you for all the feecback,
Harry




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72C? If that is really your CPU temp. your HS is not mounted properly!
You'd better get that problem solved before your CPU becomes a keychain
ornament.


"Harry Muscle" wrote in message
...
I'm looking for feedback on the idea of attaching a 80mm fan onto the
original HSF (Ajigo MF035-032) that came with my Athlon 2500 in order to
get
the full load temp down from 72C to around 60C. The original 60mm fan is
rated at only 18.5CFM, which seems quite low. I could stick on a Vantec
Stealth 80mm fan that runs quiter and pumps 27CFM, which is about 50%
extra
air flow. Is it possible that this would make enough difference to get me
down about 10C? Or should I look for a better heat sink also? In case it
matters, my case is 24C.

If you want more info about my reasoning on all of this read on ...

I currently have a Asus A7N8X Deluxe Rev. 2.0 with a Athlon XP 2500+
running
at 200Mhz * 9.5 with the stock HSF. Unfortunately I'm already hitting
temps
of 72C on the diode (at full load), which I'm not comfortable with. Since
I
don't like noise, and I don't want to overclock anymore than right now,
I'm
not looking for a super powerfull HSF. I'm also one of those people you
worries about the warranty, etc. and would rather stick to the
manufacturers
suggestions on what can be attached to the CPU. This means that I don't
want to go over the recommened 300g weight of the HSF and I would like to
stick with using a thermal pad instead of paste especially due to the
danger
of thermal pump out.

Since the original heat sink is very close to 300g and is made of a copper
base with aluminum fins bonded to it, I'm thinking that I'm probably not
going to find a much better heatsink without going over the weight limit.
Am I correct in assuming that weight to a large extent governs how good a
heat sink can be (exluding poor designs, etc.).

So if I'm not going to find a much better heatsink for my needs, it only
makes sense that I simply change the fan, instead of getting a whole new
combination and wasting money.

Thank you for all the feecback,
Harry




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"The TweakOholic" wrote in message
. cable.rogers.com...
72C? If that is really your CPU temp. your HS is not mounted properly!
You'd better get that problem solved before your CPU becomes a keychain
ornament.


It idles around 43C (this is the diode reading, not the socket which idles
around 34C, and only goes to the mid 50s under full load). I'm using the
original thermal pad, which might contribute a little to the heat, but I'm
pretty sure the HSF is on properly (for example its quite hot, so heat is
being transfered to it, but I'm thinking there's not enough airflow to get
the heat away from it ... ie: my original post)

Thanks,
Harry




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"Ed" wrote in message
...
Are you sure the HS is mounted the right way and not backwards?
72C is getting dangerous!!!

Have a quick look here at the heatsink install videos just to make sure!
http://tinyurl.com/3ue5

Ed

The heatsink is hot to the touch ... which makes me think it's on right. I
followed the instructions that came with the retail Athlon to the letter, so
I'm pretty sure it's on right. I'm just thinking it's not enough airflow
(18.5CFM ... which is quite low).

Btw, this is the diode reading, the socket is a good 10-15C cooler. The
diode reading idles around 43C.

Thanks,
Harry




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It idles around 43C (this is the diode reading, not the socket which idles
around 34C, and only goes to the mid 50s under full load). I'm using the
original thermal pad, which might contribute a little to the heat, but I'm
pretty sure the HSF is on properly (for example its quite hot, so heat is
being transfered to it, but I'm thinking there's not enough airflow to get
the heat away from it ... ie: my original post)

Thanks,
Harry

so where did the 72c come from?

"rstlne" .@. wrote in message
...

It idles around 43C (this is the diode reading, not the socket which
idles
around 34C, and only goes to the mid 50s under full load). I'm using
the
original thermal pad, which might contribute a little to the heat, but
I'm
pretty sure the HSF is on properly (for example its quite hot, so heat
is
being transfered to it, but I'm thinking there's not enough airflow to
get
the heat away from it ... ie: my original post)

Thanks,
Harry

so where did the 72c come from?



It's the reading of the internal diode when I'm running the CPU at full load
(ie: prime95).

Harry




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"Ed" wrote in message
...
On Tue, 7 Oct 2003 15:51:51 -0400, "Harry Muscle"
wrote:


"The TweakOholic" wrote in message
.cable.rogers.com...
72C? If that is really your CPU temp. your HS is not mounted properly!
You'd better get that problem solved before your CPU becomes a keychain
ornament.


It idles around 43C (this is the diode reading, not the socket which
idles
around 34C, and only goes to the mid 50s under full load). I'm using the
original thermal pad, which might contribute a little to the heat, but
I'm
pretty sure the HSF is on properly (for example its quite hot, so heat is
being transfered to it, but I'm thinking there's not enough airflow to
get
the heat away from it ... ie: my original post)

Are you using MBM?
When I built my system some guy posted this...
Do not use both W83L785T-S and W83L785T-S Diode (Asus 4) simultaneously
in MBM or results will be incorrect.

Ed


Just checked, nope, it doesn't even allow me to pick both. If one is
already selected, when I trying to select the other one for one of the other
monitors ... it simply puts it back to none.

Thanks though,
Harry




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"Ed" wrote in message
...
On Tue, 7 Oct 2003 15:55:03 -0400, "Harry Muscle"
wrote:

"Ed" wrote in message
.. .
Are you sure the HS is mounted the right way and not backwards?
72C is getting dangerous!!!

Have a quick look here at the heatsink install videos just to make
sure!
http://tinyurl.com/3ue5

Ed

The heatsink is hot to the touch ... which makes me think it's on right.
I
followed the instructions that came with the retail Athlon to the letter,
so
I'm pretty sure it's on right. I'm just thinking it's not enough airflow
(18.5CFM ... which is quite low).

Btw, this is the diode reading, the socket is a good 10-15C cooler. The
diode reading idles around 43C.

Thanks,
Harry

Things I would check,
CPU fan is blowing onto the heat sink, not sucking.

Check.


PSU is blowing the heat out of the case and not into the case.

Check.


Install at least one rear case fan blowing out of case, add a front case
fan helps but not nearly as much.

I've got two of them right behind the CPU sucking air out. Another in the
front blowing air in. Case stays at a steady 24C. Room temp is 22C.


I'm using 80mm case fans on 2 systems for CPU fans, but they have better
heatsinks then the AMD PIB parts, at full loads the 80mm don't cool as
good as the original fans do, at idle there is basically no difference.


However, what if the 80mm fan delivers an extra 50% more airflow over the
original 60mm? Or are you saying that the increased airflow wouldn't change
anything?


Ed


P.S. Does anyone have a similar setup as me (Athlon 2500 with original HSF
and thermal pad)? Could you share your temps with me (especially the
internal diode temp as read by MBM5) after running prime95 for a couple of
minutes on the max heat torture test setting. Thanks.




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I'm looking for feedback on the idea of attaching a 80mm fan onto the
original HSF (Ajigo MF035-032) that came with my Athlon 2500 in order to get
the full load temp down from 72C to around 60C. The original 60mm fan is
rated at only 18.5CFM, which seems quite low. I could stick on a Vantec
Stealth 80mm fan that runs quiter and pumps 27CFM, which is about 50% extra
air flow. Is it possible that this would make enough difference to get me
down about 10C? Or should I look for a better heat sink also? In case it
matters, my case is 24C.

I put a Vantec about two inches from the retail HSF and it dropped the
temps 15C. That's a 2500+ @ 3200+. So your idea is a good one. The
weight specs are only for PC's in transit like LAN boxes for gaming.
The Volcano 11+ keeps one of my Bartons 2500+ @ 3200+ below 44C at all
times.
http://www.thermaltake.com/products/...nk/v11plus.htm
------------
When your PC gives a little they give a lot.
http://www.dslreports.com/forum/disco

Replace the stock HSF with a Thermalright SLK-800 or 900 with a nice and
quite Vantec Stealth fan and use thermal paste. If you can't buy the
Stealth fan where you live, get a fan speed control unit to control the
speed of whatever fan you decide to use. Vantec makes nice fan speed
control units as well....

www.thermalright.com
www.vantecusa.com


"Harry Muscle" wrote in message
...
"Ed" wrote in message
...
On Tue, 7 Oct 2003 15:55:03 -0400, "Harry Muscle"
wrote:

"Ed" wrote in message
.. .
Are you sure the HS is mounted the right way and not backwards?
72C is getting dangerous!!!

Have a quick look here at the heatsink install videos just to make
sure!
http://tinyurl.com/3ue5

Ed

The heatsink is hot to the touch ... which makes me think it's on
right.
I
followed the instructions that came with the retail Athlon to the
letter,
so
I'm pretty sure it's on right. I'm just thinking it's not enough
airflow
(18.5CFM ... which is quite low).

Btw, this is the diode reading, the socket is a good 10-15C cooler.
The
diode reading idles around 43C.

Thanks,
Harry

Things I would check,
CPU fan is blowing onto the heat sink, not sucking.

Check.


PSU is blowing the heat out of the case and not into the case.

Check.


Install at least one rear case fan blowing out of case, add a front case
fan helps but not nearly as much.

I've got two of them right behind the CPU sucking air out. Another in the
front blowing air in. Case stays at a steady 24C. Room temp is 22C.


I'm using 80mm case fans on 2 systems for CPU fans, but they have better
heatsinks then the AMD PIB parts, at full loads the 80mm don't cool as
good as the original fans do, at idle there is basically no difference.


However, what if the 80mm fan delivers an extra 50% more airflow over the
original 60mm? Or are you saying that the increased airflow wouldn't
change
anything?


Ed


P.S. Does anyone have a similar setup as me (Athlon 2500 with original
HSF
and thermal pad)? Could you share your temps with me (especially the
internal diode temp as read by MBM5) after running prime95 for a couple of
minutes on the max heat torture test setting. Thanks.




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