Over the last 10 years I've found laptops throttle the processor speed in order to keep fan noise down. I prefer the fan to run noisily, and the processor to run at full speed. I've developed tried and true mods for lappies and have demonstrated their effectiveness.
I have two Lenovo W541 laptop workstations with I7-4940MX processors and discrete nVidia graphics. On one I overhauled the cooling. Copper shim between CPU and hsf, AS5 on both sides. Shims between hsf and inductors near CPU and gpu, and shim on the gpu.
Used 'thinkpad_acpi' Linux kernel module to set fan to max speed. Ran mprime (prime95 for Linux) AND Unigine Heaven, alternating, to cure the AS5. Then ran mprime. Temps were slightly high. But laptop processors tend to run hot.
The I7-4940MX is a 3.1 GHz, 4.0GHz. Turbo processor. The modded machine ran at 3GHz. continuously running mprime, for weeks. The unmodded machine with the same max-fan-speed software tweak and stock thermal-interface material, throttled to 1.7GHz. at the same running temps.
Clearly, laptop manufacturers are robbing performance off the top, by inferior cooling hardware and materials. Granted, getting the cooling mod to all fit together correctly with smooth, flat surfaces requires hours of work and materials not normally found sitting around the house.
I normally do not mod the CPU die. I abrade copper surfaces down to 1500 grit paper, and then polish with scapings from a bar of buffing compound. Everything is done on 1/2" plate glass to maintain flatness. The final mirror polish is done with the compound granules on a clean, damp cloth.
Desktop processors mostly have slightly raised corners, so smoothness is not as much of concern. You're going to get thermal-interface compond completely covering the center of the processor. The ideal is to fill the microscopic gaps between the cpu die and the hsf, but where there is metal on metal, have it be.
Metal to metal provides 100s to 1,000s times the heat transfer of thermal paste. But, on a desktop, there are more effective cooling solutions than moving air. Most user are satisfied with their laptops, because the processor doesn't run full speed long enough to make a difference.
But I enjoy tweaking, and I do processor-intensive work, like batch editing 100s of large images, video rendering, security testing, password recovery, network testing; that are all severely compromised by poor, stock laptop cooling solutions.
First I want to thank the community, who have inspired me to do this project.
I will give you guys the chance to follow me on this journey.
I hope you will all help me come up with ideas, techniques and parts that could become handy.
This modding may be possible to convert to allot of laptops.
Here is the measurement of the went hole.
77mm X 16mm
I have 2 ideas for what can be done.
I own a Clevo P151SM1 that I bought in a hurry last year after my Alienware died on me. It's done a good job of playing everything I've thrown at it but lately, it's been shutting itself off when I play certain games or graphics-heavy programs. When idle it sits around 38C which is great. But when I get into a game it skyrockets up to 97C as the last recorded temp before it shuts itself off. I've cleaned the fans and keep it on an elevated cooling pad (no fans on the pad cause I broke them) but it gets plenty of air. I know that 97C is probably damaging the card and I don't want that. Does it look like I'm going to have to repaste it? I've attached my latest readings if that would help.
Since I switched over to a single card I have all this extra space and a heat sink and fan no longer in use.
I was wondering if there would be a cheap alternative to buying the duel/6 pipe heat-sink - It is pretty expensive.
Is there a way to mod/bridge the one two I have now . I attached a photo of what it looked like before I switched to a single card. Basically the right (slave) is empty.
Of course I am not expecting a mod that would work as good as the 6-pipe heat sink built for my system. But it would be cool if I could use what I have and get my temps a little lower.
After messing with my Toshiba Qosmio this is where the fun starts for me.
Hopefully someone else can also use some of this info for their own cooling mods.
So i got this M17x R4 with a broken screen.
I7 3610, 8 gigs ram, 7970M etc.
Colors were all 70s psycho (LCD panel was cracked)
Replaced almost the whole laptop with new parts, brand new 120hz screen, brand new 3920xm, almost new Gtx 880M Oem dell from an M18.
New SSD drive among other things.
The question presents itself, how to cool the thing down some more.
I took out the Cpu heatsink, added another Pipe. Turns out the ones i had was too short and fluid filled.
Had to use my biggest iron and solder it shut before using epoxy on it to be sure.
Grinded off some rough edges and smoothed out the transition where the fins are.
This Metal epoxy is doing an alright job transferring heat from the core pad to the fins aswell.
I thought about buying the M17x R5 4 pipe cpu heatsink on ebay and modify it to fit.
I wont dremel off the aluminum bracket (upper left in this image) to make the 4th pipe fit, because then the lower cover will be losing out on a clip.
I hate loose panels so will look into cutting the 4th pipe on the 4 pipe cooler just before it reaches the chassis.
As you can see in the picture i need to grind off a piece of the aluminum just over the inner bend to make the most out of the 4th pipe if i go that route later
And so to the GPU, there is hardly enough room to fit a pipe over these three. I ordered 10 or so packets of heatsinks and coolers from some small gaming notebooks, i will get this next month.
Im thinking a wide pipe that i bring to a friend of mine for flat machine pressing, or a cnc machined flat piece of aluminum over here. I dont think The ebay R5 - 5 pipe will work with the stock bottom as is.
The GPU fan, i will buy a packet of small "P" gaskets and show you what i mean with forced cold air induction tomorrow.
Im not an engineer, but why add the hole under the keyboard. Hot air goes up not down.
On the Qosmio adding the gasket around the Fan and blocking the upper nonsense vent lowered the temps by quite a few degrees C
And finally the gaps around the fins, there will be some of the same gasket here.
No need to waste precious airflow from this (in my mechanical world) puny fan.
In this image you can see the bracket covering the inner Pipe, so a straight flat pipe will do it or the machined piece im thinking about.
Also around the edges of the fins around 5 pct of the airflow is returning back into the case. And what the heck were they thinking when they made the heatsink fins naked at the bottom leaking hot air everywhere.
Even Toshiba knew they hat to cover it to keep air flowing the right way.. outside of the case.
To be continued