[wildzzz]

Yeah I was going to say that the presence of a PS/2 port almost certainly means it has a SuperI/O chip wired up. You wouldn't be able to shutdown the PC without the LPC bus talking to the SuperI/O. MSI just didn't write code to talk to the fan controller or just didn't bother with displaying it in the BIOS config page.

[rasz]

There are multiple pictures of msi 970 master bios displaying temps and fans just fine so it did work at some point in time. Author either updated to some poorly validated bugfix only/beta bios, or maybe wrong bios for the board.

[bobsterlobster]

There's only one page for my board: https://www.msi.com/Motherboard/970-GAMING/support

And I've tried a couple of versions available there. I was even able to find some beta/unreleased bioses that I've also tested. Unfortunately, none of them enable fan control or fix temp & fan speed monitoring.