This appeared while harvesting heatsinks and suchlike from a defunct Dell Optiplex:
The only way to get access to that end of the heatsink is to break the heatsink’s thermal bond to the CPU, which seems like a Bad Idea if you intend to continue using the thing:
I buy off-lease Optiplexes from Dell Financial Services (a.k.a. Dell Refurbished) and, although their interiors always look well-cleaned, Dell (or, nowadays, FedEx Reverse Logistics) may have decided against breaking the CPU’s thermal bond and just sent me an office’s dust collection.
Doesn’t look like my dust. That’s my story and I’m sticking with it.