Hi, I have a i5 12400 and now I have the choice of these two motherboards, unfortunately the wifi version of the mortar is out of stock. I do not plan to update for, at a guess 5 years. Both are DDR4 for cost reasons. i know the mortar is better thermal wise but with the 12400 will it really make a difference? If the B660M-A wont have power limitation with that chip and in a few generations I will need a new board anyway is it even worth the extra 30 euro? Mortar = USB-C I cant see ever using, a few extra high speed ports, builtin IO shield v wifi, 4 monitors if I want without buying a card (2 hdmi, 2 DP). But really it boils down to thermal throttling as I do run intensive stuff, crunching numbers that takes hours or days on my current 8 year old pc. I either flip a coin or choose what someone more knowledgeable than me says. Someone help this indecisive sap out, it took me 4 weeks to decide between AMD v Intel.