When we took the heatsink off the drive to take photos of the PCB we took the chance to see what difference the heat sink makes if any. We pushed the drive by running our performance stability test (a 4K random test with a 30% write, 70% read split, at a Queue Depth of 256 over the entire disk) and tracking the temperature as the test was running.
Without the heatsink the drive averaged 51.4° for the test while with the heatsink installed it averaged 45.3° making it a useful drive for use in a compact PC build.