Intel HM77 (SLJ8C) platform controller hub
I measured the gap to be just a little bit higher than 0.15mm (I couldn’t fit the 0.2 filler gauge). So I tried to shim it with something, aluminum foil is definitely not enough you would need more than 10 layers. So the closest thing I had was a Coke can, I cut a square piece and remove the paint and inner coating with steel wool, trim it to 14x14mm.
it turned out to be 0.1mm, (don’t use 2 layers it will be too thick). add thermal paste to both sides. So the thermal paste only has to fill a gap about 0.025 on each side instead of a massive 0.2 gap.