ASRock J5040 Board and QNAP TS-453 Pro. Only 8GB Memory? (or "NOT"!)

I titled this: ASRock J5040 Board and QNAP TS-453 Pro. Only 8GB Memory? (or "NOT"!).
This is a video about my J5040 Motherboard. Looks like it's pretty decent for what it is. The MAX RAM is 8GB. However I read it could take 16GB. At the same time I read that my QNAP TS-453 Pro (it's pretty old and out of waranty), which has a max of 8GB RAM, can go 16GB. This is what I tried.....