Fans (again): Long Fan M10 v. Long Fan

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G2007 · #1 Post by **G2007** » Mon Jul 26, 2004 3:26 pm

I just received my 2373-6vu T42 a few days ago and, within a day, I started to notice the fan surge problem that people have been talking about here for quite some time. Unfortunately, I did not know about this site until AFTER I bought the machine and heard this annoying noise for myself.

Anyway, I've read many of the previous posts on this topic, but I can't seem to find a definitive answer as to whether both of the "long" fans are quiet.

I've read several posts that state that systems equipped with the long fan M10 (# 13R2657) do not have the buzzing noise of the short fan.

However, the message about the other long fan (# 13N5442) is muddled. I believe one person said it solves the problem, another said it partially solved the problem, and a third said it doesn't work at all.

Could people with these parts weigh in? Thanks.

BTW: To anyone still deciding: if you have full hearing capacity, avoid T series notebooks with the short fan. It might be hard to imagine that a faint buzzing noise can drive you nuts, but it certainly can if you work in a relatively quiet environment.

andyk · #2 Post by **andyk** » Mon Jul 26, 2004 4:20 pm

My T42 (2378-FVU) has the latest long fan. I have noticed that fan noise is reduced if I make sure that the CPU is NOT running at full speed all the time even in AC mode.

In Battery MaxiMiser Wizard, I created a new Power Scheme and selected "Adaptive" for "CPU speed" in both AC and battery modes.

With the included driver and XP, I think my T42 is taking advantage of Enhanced SpeedStep. I tried SpeedswitchXP but I wasn't sure if it supported only (non-Enhanced) SpeedStep.

One small utility to monitor your CPU speed (that it "adapts" to your CPU usage) is:

http://www6.tomshardware.com/cpu/200305 ... _clock.exe

If you are already taking advantage of Enhanced SpeedStep, check out Conmee's post in:

http://forum.thinkpads.com/viewtopic.php?t=1319

geobel · #3 Post by **geobel** » Mon Jul 26, 2004 6:56 pm

I've read several posts that state that systems equipped with the long fan M10 (# 13R2657) do not have the buzzing noise of the short fan.

IBM has changed p/n for fan long M10 recently but the common belief is that the p/n 13R2657 corresponds to the most quiet fan. It also cycles but less disturbing than other fans. In combination with unofficial embedded controller the problem gets almost solved...

However, the message about the other long fan (# 13N5442) i

This one is as noisy as the short fan.

Gosha

jschunkew · #4 Post by **jschunkew** » Mon Jul 26, 2004 7:32 pm

It's amazing how the IBM sales guy I
spoke with was absolutely oblivious to
the fan noise issues. I'm sure that a
buzzing fan will drive me nuts and was
set on getting a 2378-FVU (Radeon
9600) which supposedly has the quiet
long fan, but now have reservations.

G2007 · #5 Post by **G2007** » Mon Jul 26, 2004 10:28 pm

andyk wrote:My T42 (2378-FVU) has the latest long fan. I have noticed that fan noise is reduced if I make sure that the CPU is NOT running at full speed all the time even in AC mode.

In Battery MaxiMiser Wizard, I created a new Power Scheme and selected "Adaptive" for "CPU speed" in both AC and battery modes.

Great suggestion, thanks. The worst part of the pulsating short fan thus far has been that it NEVER shuts off; hopefully, under a reduced CPU speed, it will only turn on as necessary (BTW, can anyone tell me why I couldn't set up a new power scheme in my original XP user account? I had to create a second one.)

With the included driver and XP, I think my T42 is taking advantage of Enhanced SpeedStep. I tried SpeedswitchXP but I wasn't sure if it supported only (non-Enhanced) SpeedStep.

Could you explain this a little further?

G2007 · #6 Post by **G2007** » Mon Jul 26, 2004 10:32 pm

jschunkew wrote:It's amazing how the IBM sales guy I
spoke with was absolutely oblivious to
the fan noise issues. I'm sure that a
buzzing fan will drive me nuts and was
set on getting a 2378-FVU (Radeon
9600) which supposedly has the quiet
long fan, but now have reservations.

Well, I hope I didn't discourage you too much from purchasing a thinkpad altogether, because the computer has otherwise been quite good (it's my third thinkpad). It seems that you should be o.k. with the long fan M10.

andyk · #7 Post by **andyk** » Mon Jul 26, 2004 11:34 pm

Check out "Windows Native Processor Performance Control" from:

http://www.microsoft.com/whdc/system/pn ... fCtrl.mspx

I actually don't understand and haven't read the great great majority of the document. But under "Supporting Enhanced Intel SpeedStep Technology", it talks about the gv3.sys driver, which is included in my T42 factory installation.

Under "Processor Performance Control Policy", the document also talks about different CPU policies. I am not sure why the five predefined Power Schemes in Battery MaxiMiser Wizard all have CPU speed at "Maximum" in AC mode. The standard Power Schemes defined by Microsoft uses "Adaptive" far more often (which is better in my opinion).

I have only had this laptop for a week, so perhaps the experienced experts on this board can correct if I have misstated.

Mark01 · #8 Post by **Mark01** » Tue Jul 27, 2004 12:57 am

Hi,
I've already ordered a t42 2373-9XG.
Having read this topic i'm gettin a bit concerned

Does anybody know how to find out which type of fan is inside my t42?

Thanks in advance,
Mark

andyk · #9 Post by **andyk** » Tue Jul 27, 2004 1:13 am

Mark01: Again, check out Conmee's post in:

http://forum.thinkpads.com/viewtopic.php?t=1319

My T42 is really very quiet especially after making sure my CPU speed is "Adaptive".

Mark01 · #10 Post by **Mark01** » Tue Jul 27, 2004 1:37 am

Andyk,
Thanks for your reply.
fortunately i've the m10 long fan. PFFFFF

Fans (again): Long Fan M10 v. Long Fan

Fans (again): Long Fan M10 v. Long Fan

Re: Fans (again): Long Fan M10 v. Long Fan

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