I did some further Testing, after my New Heatsink performed that well i wanted to examine why the old one was that bad.
Well the Heatspreader is more like a Heat"narrower".
I put a Razorblade under the Edge and tried Lifting. The Edges popped up really easy.
The Heatspreader is soldered onto the Vaporchamber, but with less Area than the literal Die Size.
The Last Pic shows a Paper in Die Size next to the Sodered Area.
Furthermore i dissassmble the Laptop once again and installed the old Heatsink with a Coppershim in 20x20mm with 0,8mm Thickness. The Shim was lapped and cleaned and put onto the Die with a PTM7950 Sandwich.
Well my new Scores are even more impressive. I am pulling 55-57W Constantly with the new Shim on the old Heatsink.
10 min RUN
Single Run