I am borrowing the picture and info provided in this thread from the person that made the mod, and he asked to be credited: Peter Nikoloudis

His temps after playing for several hours

'
Apparently they are silent too
There are some discussions on mounting. The original modder used the holes for holding down the motherboard, he had to drill them out a bit and also drill the heat sink holes. Some in the discussion thinks it would be better to use the holes for the original plastic retainers.
Link to the heatsinks: https://www.aliexpress.com/item/1-Piece ... autifyAB=0