T43 Fan picture from Intel GPU machine - very interesting...

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#1 Post by **underclocker** » Wed Jul 09, 2008 8:20 am

FYI-

Although the T43's with Intel GPU's have been out for about 3 years, I only recently had the opportunity to open one up for a closer examination.

I only found one surprise - and it was pleasant - a nicely designed fan that actually had an extension for the Intel GPU (maybe a ThinkPad first!?) and the extension covered the Intel Northbridge chip (maybe another ThinkPad first!?).

Anyway, IBM/Lenovo finally figured out a way to account for the height difference between the CPU and GPU by using a floating hinge type system - see large picture link below.

The Intel GPU T43's run cooler in general than the ATI T43's, but perhaps this helps keep the noise and temps down even more. The T43's with ATI GPU's use a similar fan design as prior T4x's.

Maybe this fan can be used on all T4x's for lower temps? However, I noticed that this fan is mostly brass (?) not copper like the other T4x fans.

http://www.nikkoaudio.com/pix/T4x-Fans/ ... PU-Fan.jpg

rssb · #2 Post by **rssb** » Wed Jul 09, 2008 8:42 am

Interesting ! But will these work with the ATI Gpu's ?

sjthinkpader · #3 Post by **sjthinkpader** » Wed Jul 09, 2008 10:07 am

This is very similar to the fan assembly used in the R5x with intel GPU. Those has a piece of form on top for pressure. I don't know if this form is also in the T43?

I just worry that over time, the form would be compressed and the extra tail piece would lift up off the chip.

Tim M · #4 Post by **Tim M** » Wed Jul 09, 2008 7:51 pm

Very interesting discovery! It would be great if this fan would fit all T4x machines.

aaa · #5 Post by **aaa** » Wed Jul 09, 2008 8:09 pm

Tim M wrote:Very interesting discovery! It would be great if this fan would fit all T4x machines.

Don't see a reason why not. I've stuck this fan in an R51 before (after removing an R5x-specific piece), so I'm thinking that these fans are mostly interchangeable with each other.

Tim M · #6 Post by **Tim M** » Wed Jul 09, 2008 11:11 pm

aaa wrote:
Tim M wrote:Very interesting discovery! It would be great if this fan would fit all T4x machines.
Don't see a reason why not. I've stuck this fan in an R51 before (after removing an R5x-specific piece), so I'm thinking that these fans are mostly interchangeable with each other.

Great...yet another upgrade for my T42.

#7 Post by **gator** » Wed Jul 09, 2008 11:28 pm

Interesting discoverty Ed ... I did not know about this (either). Keep up the good work!

Tim M · #8 Post by **Tim M** » Thu Jul 10, 2008 12:31 am

^ Yep. If someone can test this fan on a T4x, I'd be completely sold.

NovaKnowledgeNow · #9 Post by **NovaKnowledgeNow** » Fri Jul 11, 2008 1:04 pm

I can't see any reason why this wouldn't work in any of the other T4x's. Replacing the ram I presume?

DarkMark · #10 Post by **DarkMark** » Fri Jul 11, 2008 7:35 pm

I personally don't understand how this will help cool down an ATI based T43, because the graphics chip wich generates most the heat is already covered anyway, so with this cooler you would only spread that heat to the northbridge. The Intel based one has an integrated graphics adapter in the northbridge so it needs more cooling. Or is the gpu not cooled on a regular T43? (I only know how the T43p looks from the inside.) I personally wouldn't want to burden my northbridge with the the 80+ °C thát my gpu and cpu easily produce.
Can anyone explain?

aaa · #11 Post by **aaa** » Fri Jul 11, 2008 9:22 pm

underclocker wrote:Anyway, IBM/Lenovo finally figured out a way to account for the height difference between the CPU and GPU by using a floating hinge type system - see large picture link below.

sappyse107 · #12 Post by **sappyse107** » Fri Jul 11, 2008 9:22 pm

Interesting, as I had to buy a new heatsink and fan and opted for the chipset portion included. I planned on just swapping the fan since I grenaded the fins off using compressed air (not a can either). Oops. So anyway, I have a laser thermometer that I will be using to see how hot things get. Had this thing less than a week and already messed it up.

agarza · #13 Post by **agarza** » Fri Jul 18, 2008 12:33 pm

Interesting thread, do anyone knows the FRU part of this 'special' heatsink. I'm looking to do a 'facelift' on my T42p replacing SXGA+ screen, heatsink & palmrest.

#14 Post by **underclocker** » Fri Jul 18, 2008 1:03 pm

I took the picture so you could read the PN - 91P8754 & FRU 26R8197

Here's the current eBay selection:

http://search.ebay.com/search/search.dl ... le=26R8197

http://search.ebay.com/search/search.dl ... le=91p8754

agarza · #15 Post by **agarza** » Fri Jul 18, 2008 1:13 pm

Thnks underclocker for the link, in the future I will install one of those into my T42p chassis and see what happens

sappyse107 · #16 Post by **sappyse107** » Fri Jul 18, 2008 3:06 pm

I have been messing with the original replacement now, and added some copper foil tape to the chipset and the other chip under the wifi card. I doubt it made a heck of a difference being .003" thick (layered it to .009". The CPU is pretty much identical with both types though. I got a lot better results from undervolting the 1.73ghz cpu. With prime95 it would hit 69 degrees celcius. .3 volt less and its 56 degrees max.

I couldn't record any temps for the chipset when the other heatsink was on there other than through the pad (worthless to compare). Without any cooling it was 120 C. The chipset under the wireless card would hit 130 on the bottom right corner, and 100 on the top left. I spent more time with it and my copper foil to direct it to the cool side of the CPU heatsink.

Of course I found the TPfancontrol that tells me all the system temps after I did everything.

agarza · #17 Post by **agarza** » Fri Jul 18, 2008 4:28 pm

sappyse107, so you could say that using that T43 fan without any modifications will do any good to reduce temps, or is better to rely only on undervolting CPU/GPU

sappyse107 · #18 Post by **sappyse107** » Fri Jul 18, 2008 5:20 pm

Right now I don't see any significance between them for the CPU. I noticed the video card portion is thicker on the T43 2668-CTO (ATI X300), but I didn't compare the temps enough. I should say that I do no gaming or intense video so the video is set for the lowest clock and ram in notebook hardware control. 104.63mhz core, 121.50mhz memory. The cpu at idle sits at 34 degrees C at 800mhz and .7 volt. I should state that the ambient temps are around 25 C. ::20 min later:: I am running prime95 on the battery and 800mhz/.7 volts, and the temp got up to 42C, and then dropped back down to 40. hard drive went from 28 to 30.

I will be tearing it back apart to modify this heatsink some more. I want to remove the heat transfer pad that IBM used and only use the arctic silver thermal paste. I used to do water cooling/peltier and overclocking about a decade ago:P funny how now im undervolting and going for minimum temps. Haven't given up the thought of overclocking a dothan though:P

agarza · #19 Post by **agarza** » Fri Jul 18, 2008 8:23 pm

Good. I'm using my T42p without the pink pad on the heatsink, I also didn't measure the real gains with the heatsink unmodified and then with AS5, considering the fact that TPFancontrol triggers the fan at 50C.

T43 Fan picture from Intel GPU machine - very interesting...

T43 Fan picture from Intel GPU machine - very interesting...

Re: T43 Fan picture from Intel GPU machine - very interestin

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