new2h20cool

I was researching parts for a possible build and was interested in the MSI MEG Z490 GODLIKE mother board and the Corsair DOMINATOR® PLATINUM RGB 32GB (2 x 16GB) DDR4 DRAM 3200MHz C14 Memory Kit but they do not seem to be compatible with each other according to the websites. is it really true that I should not use these together or is that just the manufacturers being conservative? Any thoughts on the question are appreciated.

I am trying to understand the benefit of a lower Latency C14 vs. C19 as compared to a faster Speed 4266 MHz vs 3200 MHz. Why does the faster speed command/justify more than double the price of the lower Latency where in both cases it is a total of 32 GB of ram? DOMINATOR® PLATINUM RGB 32GB (4 x 8GB) DDR4 DRAM 4266MHz C19 Memory Kit ($969.99) DOMINATOR® PLATINUM RGB 32GB (2 x 16GB) DDR4 DRAM 3200MHz C14 Memory Kit ($444.99) Thank you in advance for all the answers/responses.

I am about to build my first water cooled system and have been watching only about 1,000 different videos on the topic to try and learn how to build it most effectively. One of the videos indicated that there maybe an inefficient airflow push/pull due to the gap between the fan and the radiator. My understanding is the gap is created due to the fans and radiators not being perfectly flat. I was wonder if anyone has placed a thin layer of foam (1 mm or 2 mm) on the edges of the fan to create a better seal between the radiator and the fans.