Thinkpads Forum

Hello everyone , I write from Italy .
sorry for my bad English , but it is not my fault if any of you speak Italian . : D

I am a technician working for Sharp and enthusiast thinkpad for years, I have several at home.
I developed this modification of the fan T61P to solve the known problem of the video card .


I think the main problem of the T61P is that the cooling system can not handle peak heat that produces the nvidia fx- 570.

this happens ' cause the heat conductor is too long and thin.

I had to add an additional thermal circuit taken from a x60

has been a difficult job with a heater air temperature , pond and lots of patience , with the heat all the conductors of heat detach and move.

to take the right steps I had to insert a motherboard T61P route in rollcage , mount the heatsink on and weld .

to -day I will come ' a new motherboard and can' test the system , I just wanted to share it with you all.

I also bought a panasonic thermal pads on the card is even better than copper , I want to use it instead of thermal paste .

http://it.rs-online.com/web/p/gap-pad-termici/7123992/

I expect that this work will work the T61P ' very low temperatures for many years ..


P.S. I can not find the topic for presentation

hello to all.

http://i943.photobucket.com/albums/ad28 ... 02b91e.jpg
http://i943.photobucket.com/albums/ad28 ... 3bfe8b.jpg


for clarity here is also a picture of the original heatsink
http://i943.photobucket.com/albums/ad28 ... f318c4.jpg

Interesting mod.

A for effort, but i think the mod will have limited use, since you delivered the heat from the additional pipe to the
metal right above the fan impeller instead of into the radiators. All that heat has to conduct through the fan body to the radiators.

I'm not saying it will do nothing, just that it will have a limited impact.

86turbodsl wrote:Interesting mod.

A for effort, but i think the mod will have limited use, since you delivered the heat from the additional pipe to the
metal right above the fan impeller instead of into the radiators. All that heat has to conduct through the fan body to the radiators.

I'm not saying it will do nothing, just that it will have a limited impact.

I agree, but unfortunately because of the space there is no way to add heating elements inside the impeller without disturbing the flow of doing nothing but damage.

however, we are talking about 3 mm from the copper heatpipe cooler, I think the impact will be 'heavy.

I noticed that the gpu is always working at a temperature of 16 or 20 degrees C more 'at the top of the CPU, a sign that the heat is not transferred to the fan quickly.

In addition to this, the gap thermal pad that I bought has a conductivity 'thermal 1600W / m * K
(For comparison, the thermal paste is 9.0 W / m * K and that of copper 350 W / m * K)

will be strange if the impact will be 'minimal.

as I said, I already have several drawing element to be added but I think it would slow down the flow and then nothing but harm.

accepted recommendations
stock
http://i943.photobucket.com/albums/ad28 ... ba6e3f.jpg

option1
http://i943.photobucket.com/albums/ad28 ... baed45.jpg

option2
http://i943.photobucket.com/albums/ad28 ... 2d3b90.jpg

It seams that putting the fan from a T500 in the T61-fan housing is more effective.

RealBlackStuff wrote:It seams that putting the fan from a T500 in the T61-fan housing is more effective.

RealBlackStuff , I read your posts for years , you're a legend for me nice to meet you

about the T61P
I do not think it's a problem of fans, when I play I keep the fan fixed at 64 with tfc and I also have a fan connected to the docking station , which draws air from the exit , but the temperature of the GPU while playing the game never drops below 70C clearly in heavy overclocking ..
http://s943.photobucket.com/user/aldime ... c.jpg.html
http://i943.photobucket.com/albums/ad28 ... 8aa569.jpg
I think it's a problem of insufficient heat transfer :

maximum cpu supported in T61P is the T9500 which dissipates 35W max , then the heatsink is designed for that cpu

the fx -570 dissipates 35W , looks like the heatsink is made and tell me if there is a problem.

the cpu has two thermal conductors , and is close to the fan to the side of the case.

the gpu is at the center of the motherboard, the thermal conductor is only 1 very long and thin.

Certainly, if the GPU is used with office applications , the problem is not there, but if you use the 3d ..

in fact, during the game, the temperature of the cpu is much more ' lower than that of the GPU , a sign that the system fails to transfer the heat from the GPU to the fan.

the motherboard will come 'in the next few days and see if I'm right.


I forgot: my T61P is a model built 08/08, it took a few years to break down but in the end ..
hello

One thing to keep in mind about this generation of GPU chips is the max temp isn't the major factor that leads to failure, rather the number of heat cycles. The failures are caused from stress, as the chip heats and cools, the different materials within the chip expand at different rates and the transformation from room temp to operating temp eventually leads to fractures.

It is a good idea to control the max temp and your mod may succeed in doing this, but you should also try to avoid the number of heat cycles the chip is subjected to if you want to prolong it's life.

Thanks for sharing.

Unfortunately, the new motherboard that would replace that burned was damaged too, worked intermittently .

I , however, ' had the time to do various tests of operation: and I saw what really works.

the most ' important thing is to apply the thermal paste and press down firmly on the heat sink before mounting it , even better if you can' move even a little ' side of a couple of mm .

holding down then you can put the screws in this way reduces the thickness of the dough drawing that being a bad conductor will improve ' the thermal conductivity of a lot.

apply the paste in this way lowers the temperature of a 15 C even with the standard heat sink

one other thing , if you notice that the operating temperatures increase suddenly, definitely a thermal conductor on the heat sink is damaged, I would not have given a lot of importance and one month after the motherboard is dead.

my T61P has now become a t61 with intel card , I have to say that the graphics you see much difference , the performance simply opening windows windows are quite scarce, however I sold it today installed dual boot with windows 7 64 and ubuntu 64 12:04

about panasonic thermal adhesive , it works well , but is not to be used on cpu and gpu which transfer much heat.

is fast but very soon becomes saturated and can not carry a large amount 'of heat.