How to change out a heat sink on an AM3+ motherboard (Socket 942)

I am doing maintenance on my wifes desktop in this video and I am changing the stock heat sink from the smaller heat sinks that come with older era AMD processors to a larger stock AMD heat sink.

Bulldozer, zambezi, pile driver era AMD processors will dial it back in TDP if they exceed a temperature threshold. A larger heatsink aside from liquid cooling will fix the issue.