I initially used AIKENUO thermal pads 1mm/2mm/3mm for the GPU side and 3mm for the backside. This led to ~80mh/s consistently with gpu memory junction throttling at 110 degrees.
So I bought 3 packs of fujipoly 1.5mm and replaced all the AIKENUO pads on the side with the die. I precompressed a pad with a dough roller and stacked it on top of a regular 1.5mm for the 4 locations around the die. I used 1.5mm over the grey LR22 things and I needed to use 3mm/4.5mm on the skinny line adjacent to the LR22. Then I applied a more than adequate amount of thermal paste on to the die (MX-4).
Close everything up and check for gaps on the side using light and I had to apply thermal paste to fill any spots so there is full contact with the heatsink. This used all 3 packs so I had to keep the same AIKENUO thermal pads on the back side. These were stacked to 4.5mm lol and I used a clamp to compress the backplate. Finally I used a cooper heatsinks above the backplate over the pads and I am back to a consistent 115 mh/s
I was initially averaging around 110mh/s with my stock 3090 and I def learned that if it aint broke, dont fix it. I must have taken my gpu apart and put it back together at least 20 times 🤦♂️