Increase contact b/w heatsink and GPU T61

Hi guys,

Anyone remember that post about somebody increasing the contact between the heatsink/cpu/gpu/fan or something like that which drastically reduced the heat from either cpu/gpu in the T61?

I remember seeing something like this on the forums, can't remember which post tho.

Thanks

PS. Anyway of getting the X4500 with the T61? =D

 

It was telling about bending the heatpipe and the fixations. Not a great deal because if you bend the heatpipe too mutch, it will work worth.

 

forum.thinkpads.com has a few

here's one

http://forum.thinkpads.com/viewtopic.php?t=60695&highlight=gpu+temperature

works well but like pascal said, be careful.

You can also bend those metal clips that hold down the GPU and PCI chipset for added pressure

undervolting will also help

 

undervolt with what program?

 

wow bending the heat pipe makes quite a difference, anybody here done this? would you be willing to post some pics? I'm really tempted to try this but I wanna see some pics of it done first

 

I have done it. it helps but I wasnt able to get as good as results temp wise because I have the t7500

By bending the GPU pipe, you increase contact. But then it also raises up the pipe slightly and pushes thet left side of the keyboard a little higher. It took me a few tries get a decent increase in pressure and minimize the effect on the keyboard.

While your at it, change out the thermal grease. I have tried arctic silver 5 and ocz freeze. The ocz freeze gave me slightly better results and is nonconductive electric wise

to get those temperatures you need to

1) swap out thermal grease
2) undervolt
3) bend clips or use double side tape to increase pressure
4) bend GPU pipe

optional for best results
5) use TPfancontrol to set fan to max or disengaged mode

 

still no pictures? anyone?

 

What kind of pics would you like? just the heatsink itself?

 

I too would like some pictures of the heatsink setup because I'm going to be swapping out the heatsink compound with AC MX-1 or AS Ceramique when my T61 gets here. Having some pictures of the interior would help. Thanks

 

Ok here are a few pics

1) note the dimple on the heat sink pipe. That was me pushing the pipe in a little to avoid having an uneven keyboard. You dont have to do this, its just that the uneven keyboard was driving me nuts. No noticeable difference after I "dimpled" it. (I am still getting the same temps just after doing the mod - with no dimple and an uneven keyboard)

as you can see, the dimple is no worse than the existing bend (part where the pipe meets the gpu)

2) that gray stuff on the GPU/northbridge is double sided tape. The original poster used this. I copied him and also bent the clips to get even more pressure.

3) had to drop the quality a little to meet quota

let me know if there is anything else you need.

 

howr u increasing contact with anything using the double side tape? i'm a lil confused...

 

by raising the surface (the northbridge/gpu ara) to which the clips make contact. Also keep in mind the tape is a little thick and stacked 4x

I tried it with double sided tape first and got a slight increase in pressure. then I decided to just bend the clips. This dropped the temps even more. I just left the tape.

You can probably get away with just bending the clips.

 

Did i get this right?

 

shiit! i don believe how clueless i am about what u guys are doing over here! lol...

now bending the pipe at that 'mysterious point' will increase heat sink contact with what part of the gpu?

 

lol

Here you go, I circled the clips that you are suppose to bend in green. basically, you can bend it more than they are already bent or put in some tape to increase the pressure which increases the contact between the heatsink/gpu and increases heat dissipation (hopefully). So just before you bend the clips (use plyers or something) add some thermal compound (Arctic Silver 5 or the OCZ Freeze).

That should be it, unless I'm missing something.

 

not exactly,

see where you noted the bend? thats the stock bend that lenovo puts on it. Then bend you are looking for is that slight hump (or raised point) near the barcoded part of the gpu pipe (to the left of where you circled).

You have to completely remove the heatsink (which will require you to also remove the bezel). When you have the heatsink in your hand you can see that the only way pressure is applied (ignoring the clips) to the gpu is via the pipe. Bend it such that the gpu/north bridge part is LOWER than the cpu contact point. When you put it back in, you will get that hump near the bar coded part of the gpu pipe

bend it too much and you will have problems. Also make sure to bend/rotate the gpu/nb side to compensate. You want a clean, flat contact area on the gpu/nb

Now see the smaller metal clip on the top portion (near the 3 wires that run the wifi)? that part of the copper heatsink is the gpu. (note that when you look at the pipe in that area, its left and right are covered by a little extra copper.)

Now see the bigger metal clip on the bottom portion? that's the area the northbridge is found.

northbridge is directly below the GPU

 

sweet... thanks... so bend the copper gpu pipe...

can u also bend the metal clips?

 

yeah. bend them downward and apply pressure to screw them in.

just remember to be careful not to bend the gpu pipe such that you block its airflow

 

will do thanks =D

 

bending the copper heat sink will put more pressure on the gpu's integrated heat sink? or just the surface of the gpu?

 

bending the copper heatsink will increase the contact between the heatsink and the gpu... this will increase the amount of heat the heatsink can draw from the gpu thus cooling it...

 

why do you bend stuff ... can you not just add thermal paste to seal the gap between the chip and the heatsink ?