37-38 is the lowest I could get the MSI board to train, anything lower set in directly or via RTL compensations would not POST.

When my board was shiny and new, getting PSC to run 1333 8-12-8 on air was relatively easy (once you know the ODT trick) but on my recent re-tests I couldn't get it to work no matter what. So it's hard for me to objectively judge what MSI boards are like on LN2 as my particular sample (in a messed up state) was relatively difficult to operate. For example, I needed around 0.10V more than I would on M6I/M7G and certain timing combinations that I know the kit can easily do wouldn't even POST (like tWRWR=4, had to run 5).