Originally Posted by ViTosS
Guys can I use liquid metal on the block of my Corsair H150i Pro? It is copper, but the radiator is aluminum, mey 8700k is delidded with LM between IHS and DIE but for the top of IHS I'm using Arctic MX-4 (tried Kryonaut but had worse results). So I'm thinking of using LM between the H150i Pro block and IHS, what do you think?
I used liquid metal between IHS and my NH-D14 and in the end I was pretty unhappy with how it turned out. I regret using it.
The base of the NH-D14 is nickel plated copper so should be a bit better than pure copper when using liquid metal. I left the cooler on the CPU for about five years before I had to remove it because the temperatures had turned bad. This was on a delidded i5-3570k. The liquid metal I used was CLU. The cooler was installed in 2013 and I left it on there until 2018 without touching anything. It took about four years before I noticed that the temperatures had gotten worse than they were originally. After five years, temperatures were about 10 °C higher than normal and then I removed the NH-D14.
The liquid metal had turned into a sort of tiny crystals. That dirt was stuck to the top of the IHS and to the base of the NH-D14. It was not possible to remove all of that dirt without force. I ended up using sandpaper on both the IHS and the NH-D14's base. After working on things, you could see that the liquid metal had moved through the nickel plating of the NH-D14's base and into the actual copper. Between the die and IHS, the situation was looking better. I could remove the residue on the inside of the IHS with a metal sponge, I didn't have to use sandpaper there. On the die, things came off with paper and cloth.
I have polished off all of the nickel plating on the base of the NH-D14. The edges of the base are now a red copper color, but it has a silver color in the middle where the liquid metal was touching it. When I tried putting a scratch into that silver area, I couldn't see a red copper color in the groove of the scratch. I guess this means the liquid metal has moved deep into the actual copper, it's not just a color change on top of the copper surface. The temperatures of the NH-D14 are still good.
I would recommend against liquid metal for the cooler because (1) it seems temperatures won't stay good indefinitely so in that sense it's not better than normal paste, and (2) it seems after a long enough time it will require sandpaper to clean which is pretty annoying and much worse than normal paste.