Idk what reviews you are looking it.. it really depends on the workload quite honestly.
A cinebench like workload thermal throttled my 14700K.
Normal Windows operations were 50-60 C
Battle field 2042 loading screen made it hit a 100 C and during gameplay it would hover around 80 C.
On a LT720 360mm AIO in push pull.
Even with a AG620 im sure ur going to see reasonable high but manageable temps. Forget AG400