So, say you tear some of the pads for memory trying to deep clean your gpu.
😱
You measure the original pads and find out that those are 2mm thick. Ok, you get to shopping, but:
Arctic TP-1 2mm
Arctic TP-3 2mm
Gelid GP-Extreme 2mm
Gelid GP-Ultimate 2mm
Kritical 2mm
Thermal Grizzly Minus 8 2mm
... and more! Oh geez, which to pick!
Problem is, even if you see the 2mm specification,
they are not the same.
There's no established testing standard between these products. Take W/mK, for example:
So if pads behave differently with temperature and different cards(cooler mounting pressure), how do you know which one to go with?
YOU DON'T.
Some straight up get lucky with their choice. Others aren't so fortunate and go through a few or more before finally getting it right.
Some copy what someone else did for their gpu - if they can find that info - and others even manage to crack the gpu's PCB in the process...
If someone hasn't already done pad replacement with a specific card, you're kinda on your own.
Copy what another user did to a T, if you can find a guide for your specific gpu, but pad replacement is very niche.
I'd imagine some of the above is why reviewers - at least the popular ones - don't cover this subject.
Leave the original pads be, unless you absolutely HAVE to.
If cleaning the gpu, remove it from the PC and blow it out - but lock the fans down with something so they don't spin.