Copper shim + thermal paste for CF-19 and CF-31?

Hello,
I currently have a Alphacool 17W/mK 1.5mm thermal pad on my CF-19. It has served me very well and it still is. I am about to strike a deal on a decent CF-31 and I am intending to order a set of thermal pads and I am thinking that I may take this opportunity to maybe go thermal paste + copper shim.

Has anyone ever attempted uisng copper shim thermal paste on CF-19 and CF-31? What thickness, and were they worth it?

 

Don't. Copper shims add resistance.

 

You're transferring heat not conducting voltage.
Totally different

 

Even then it adds nothing but thermal resistance.

 

The only toughbooks that I can think of that did that from the factory was the W and T series. Had paste and a copper shim going to the bottom of the keyboard.

There is only one or two 19’s I had to do any cooling mods too. I just used a better replacement pad.

So far on my 31 it hasn’t needed anything extra even with gaming on the 7750 video card.

 

I remember a discussion on this a while back when I also found myself with a handful of copper shims. We surmised that a solid copper shim on a CF-30/31 would transfer much more kinetic impacts from external bumps, hits or vibrations through the bottom of the case to the CPU/GPU than if there were thermal pads. We decided that just for that reason alone, it was a bad idea.

 

That is an excellent point actually.

Also I decided to just stick with CF-19 and a Microsoft Surface Pro 3 instead of CF-31. I decided to go for lighter and smaller rather than big and reliable this time. I will have CF-31 someday though.