> 1x USB 3.2 Gen2 Type-E Header
typo on page 7: should read type-c. On page 1 should probably mention 'type c' under '20gbps'
> I find it extremely difficult to review budget-originated products because they lack things to talk about. The MSI MAG B660M Mortar WiFi DDR4 is no different. In many ways, the motherboard fails to meet my expectations. To even get Prime95 software to run with a i9-12900K, I had to tweak some settings in the BIOS. That being said, if the goal is to build a low-cost rendering or encoding computer, this is not on my recommendation list without a serious consideration of the application being used and case air-flow.
It does not seem to be reasonable to test an absurdly priced CPU with a moderately priced motherboard. However it is worth noting that this is just a snazzed-up version of the cheaper Pro A board, with an upgraded audio chip etc. Probably most people could save their cash and buy the cheaper board. This board is overpriced IMO at $180.
> Given it still supports PCIe 5.0 and has two M.2 Gen4 sockets
Um, while PCIE 5.0 is useless anyway at this point, the MSI website says in the manual and all specifications that this is a PCIE 4.0 board, not 5.0
> Second x16 PCIe slot is only wired for Gen3 4x
that's a function of B660. With only 6 PCIE 4.0 lanes on top of the first M.2 from the CPU, nobody will offer a second 4x4 x16 slot, because it rules out a second M.2 at 4x4. Hence the PCIE 3 lanes can be used either for a third M.2 (3x4), or a 3x4 x16 slot, etc. If you actually need a second such card, then you'll need an H670 or Z690 board.
It would probably be useful to give some more detail on the wifi card that's fitted to this thing - specific chip, Bluetooth level, etc.