RTX 4080 MXM on Clevo. Hot as heck

[Kalman]

On 5/22/2025 at 12:08 PM, SuperMG3 said:

Even with some good thermal pads and PTM 7950

I think you should try some thermal paste not thermal sheet.

PTM7950 has a thermal conductivity of 8.5W/mK.

Kryonaut extreme paste has ~14W/mK.

Conductonaut LM has ~70W/mK but is risky to use it.

 

Using thermal sheet with a fix thickness is not ideal either because if there is just a tiny amount of air between the die and heatsink it will not work and you will not see it.

 

After using thermal paste you remove the heatsink you can inspect how firm is the contact.

 

If you are using thermal pads with the not correct thickness it can elevate the heatsink from the GPU die.

You can try putty for example Thermal Grizzly Putty Pro.

 

[SuperMG3]

Even normal paste would be enough because of the new heatsink I designed