I looked around and everybody on the internet seem to think that apple charges a lot for ram upgrades and that you can buy cheaper options elsewhere. Partially true.
Even tho there are cheaper options for ECC ram, none other have the thermal sensors. So why spend 3.5k+ for a mac designed to use 1 fan to control the temperature and then put RAM that the computer can't monitor.
I might be wrong on this but this for me were the only logical option and I'm pleased that they worked as expected.