I have a Thinkpad x1 extreme gen 5 with an i9 and 3080. Liquid metal. Overheats like crazy. I want to get in there but I hear it's such a pain to deal with I've been putting it off. Definitely will be swapping to one of the thermal pads when I do it.

I was wondering where the liquid metal would come from but apparently it's an alternative to thermal paste.

This video is by the owner of Thermal Grizzly. They make thermal pastes and putties, but I think they're best known for their KryoSheet graphene pads.

Although I've never been conscious of pump out as a problem, and have never reapplied thermal paste, I did use a KryoSheet on a 9800X3D in my most recent build. So far, so good.

Another liquid metal you have to watch out for is mercury. A former employer of mine traced elevated RAM degradation in a particular datacentre to mercury contamination in the canal the used for cooling water. Mercury has an interesting way of migrating through other metals.

There's been concerns for a while with the PS5 and the use of liquid metal in that. Especially given it stands vertically, and that liquid metal can "shift"