Quiet and Cool. Thermal paste replaced! 38@idle 73@load

E6500 (5 Minutes, one screw backcover, three for the fan, four for the cooling assembly):
http://support.dell.com/support/edocs/systems/late6500/en/sm/html/cpucool.htm#wp1182399
--> clean the copper and the CPU completly from old thermal paste (e.g. high alcohol).
Arctic Silver 5 will help you to get this better and give you maybe nearly the half way of the success (better than no action, than cheap and nasty originat thermal paste). The thermal conductivity is 82 to 9,1 according to the figure above.
Be sure to have a very small amount of thermal paste over the whole chip and best -IMHO- is to rub a little thermal paste into the cleaned other side (copper). Do not clean the copper twice. The thermal paste should be as thin as possible, covering the CPU area and compensating mikro structures in the copper but not creating additional height.

Sorry I can not write a more detailed howto now as I have to go back to work (financial crisis).

Btw: This result was planned. If you want you can read additional optimization ideas in my old post back in Sept. 2008.
http://forum.notebookreview.com/showpost.php?p=3946846&postcount=2
Yes, now we even see better results. Next will be a nice cool and fast 256GB Samsung SSD. And next I would like to research more on my pinmod concept to decrease the minimum CPU-voltage under 0,9 Volt.
http://forum.rightmark.org/topic.cgi?id=6:1660
And what is about an undervolting of the GPU?
New frontiers, to boldly go where no man has gone before...

 

I replaced the thermal pad on the cpu with arctic silver some months ago and I have similar results. Coretemp displays 36°C in idle (lowest value possible) and something around 70°C at full load. Also the temperatures are very responsive to cpu-load. For example loading a website lets the temperature rise to about 40°C and decrease immediately back to 36° when loading is finished.
I did not replace the thermal pad von the Intel GPU since there is a thermal pad and I wasn't sure if the thermal compound would be enough to provide contact between gpu and heat pipe.

 

You can't undervolt a GPU unless you do a pin mod.

 

Without pin mod. I only want to try a small bios mod via software.
http://www.mvktech.net/component/option,com_remository/Itemid,26/func,fileinfo/filecatid,3008/parent,category/

 

You can undervolt a GPU, its just complicated and you will only be able to take it down by .5v. Not worth the trouble in my opinion its only for advanced users.

You use NiBiTor (Nvidia BIOS Editor) to modify the vBIOS and reflash your system. Its risky if you do not make backups of your BIOS. You can even overclock and tweak the fans while your at it.

 

Thanks flipfire.
To me 0.5 Volt would be huge, as changing input voltage has much greater effect on power disspiation than changing clock speed, because power disspiation is about proportional to the square of the voltage whereas it is only directly proportional to the clock speed.

By decreasing or increasing voltage 2 times, you respectively decrease or increase power consumption (and dissipation) 4 times.

Btw-1: Anyone heared about registers for undervolting the Montevina Northbrige?

Btw-2: Finally there is a new beta of NHC (Notebook Hardware Control)
http://tinyurl.com/cmx9ob
Maybe the new NHC is more up to date as RmClock (better support of CPUs and Chipsets)?

 

Oh yeah, forgot about that. 0.5V is pretty big actually. Good luck heinz! Post up your results!

 

My productive optimum for 2,8 GHz is now 1,000 Volt.
0,9875Volt@2,8GHz seems to be stable but I gave it an extra tick.
59 degrees Celsius@100%load at 3900 UPM.
56 degrees Celsius@100%load at 4870 UPM (enforced).

Conclusion for the thermal mods and full load:
Based on undervolting using NHC/RmClock to 1,000 Volt combined with Coollaboratory Liquid pro for the CPU and Arctic Silver 5 for the Northbridge
the result is a huge 33 degree drop
from the original enviroment=92degrees Celsius to optimized 59 degrees Celsius.

 

If you werent aware, there is a new undervolting program called CPUGenie which supports Montevina, its pretty neat program. Its not for free though, you can try it out for 30 days.

 

@flipfire: Thank you. I have seized your suggestion.
I now have tried out three programs for CPU voltage control.

(1) Rightmark Clock Utility: RmClock V2.35
Best functionality, worst support
(2) Notebook Hardware Control: NHC 2.0.7.3 (Beta Version)
Beta functionality, good support
(3) GreenVantage LLC: CPUgenie 1.1 (demo version)
Good functionality, professional support

At present I have 35 degrees Celsius idle@0,950Volt/800MHz.
Up to 2533 MHz 0,950V have been stable in all tests.

My tested borderline voltages are now:
800 MHz 0,950V=stable 0,950V=productive none=Failure
...
2533 MHz 0,950V=stable 0,975V=productive none=Failure
2666 MHz 0,987V=stable 1,000V=productive 0,975V=Failure
2800 MHz 1,037V=stable 1,050V=productive 1,025V=Failure

Today I am prefering CPUgenie 1.1, even as it is not for free.
CPUgenie has better stability test and I used it.
Due to savty reasons I have rised the load voltage at 2800 MHz to 1,050 Volt.
I found two small problems when using some advanced customization features.
(1) Missing updates of Background window when a subwindow is closed.
(2) A freeze of CPUGenie at changing load thresholds for switching up and down.