Do USB thumb drives slow down as they get hot?

[MrFunex]

I’ve got a few (cheapish) USB thumb drives in the 32-64Gb range and when copying large amounts of data to them, they seem to run at full speed, about 20Mb/sec, for around half a minute, and then slow to 2-5Mb/sec afterwards...

Is this Windows cacheing data, or do cheap drives have a tendency to thermal throttle?

 

[MrFunex]

Thanks for the replies. If I get bored one evening, I might open up a spare drive, stick a small heat sink on the memory chip and look at the benchmarks before and after!