The ASIC's are actually on the PCB side (I think). At least that was one of the takeaways I got from
this post. As for the temp I just pointed a
laser temp probe at (what I think are) the ASIC chips.
Interestingly, the silicon around the chips are considerably warmer than the chips themselves...

Those are the decoupling caps on the "back" side of the board. The ASICs are "underneath" the stitched thermal vias just beside those caps, under the heatsink as was stated earlier. You can measure the core voltage at that point, doesn't mean those are the ASICs
