Trying different heat sinks with the Raspberry Pi 4

"I’m fortunate to have an electronics graveyard in my basement, so I was able to try out a number of different heat sinks. The heat sinks I used differed in shape, material, mass and surface area. They include two (A, B) that were attached to ICs, and four (C, D, E, F) that I found on old motherboards.

To my surprise, all of the heat sinks were able to keep the CPU from throttling during 10 minutes at 100% CPU usage, including heat sink A, which is really just a bent strip of aluminium."

Source: Young Coder