Originally Posted by gupsterg
+rep for video share. Surprised you so such a gain, as IIRC from all of der8auer's videos on this aspect he didn't see the gains you did.
I think that has to do because in all of der8auer's delid videos ( except the last one ) he keeps using the heat spreader, so he only replaces the indium solder with the liquid metal compound. In my case I don't use the heat spreader anymore and the cores touch the water block directly. This removes two layers from the heat path from the core to the air, one layer of thermal compound and one layer of metal ( the heat spreader ).
This 15 to 20 degree improvement is in line with all the delids I've made trough the years where I never used the heat spreader, since my phenom II times and then a bunch of subsequent intel cpu's that I owned before the 3950x.
There is one extra very interesting thing regarding using the bare cores onto the cooler block: it is block pressure and evenness. In the last delid video from der8aurer, on his first power on try he has quite bad results, very high temps, and he them reapplies liquid metal and tries again with better results. It didn't happen to me, but I did optimize my block pressure and evenness in a very easy and surprising way: I set the CPU to 2500mhz and locked voltage to 1v, and in prime95 I set a fixed fft and run at 32 threads. This made the heat output from the cpu very very constant. I let the system run until the temperature no longer raised and I then launched hwinfo.
hwinfo gives you per ccx temperatures with very fine grain in real time and I used this information to tune in the four screws of my cpu block. the result was surprising. I was able to gain 4 extra degrees ( from 14 to 18 ) just by adjusting slightly each of the four screws and it was quite funny as you could see temps change when rotating the screws.