A:AnswerIm not sure about other brands but the corsair mp600 the heatsink is actually removable, if not u can just take place them without the msi heat shield, that way u can show off your nice m.2 drives. And interms of pcie4 support i think it is all 3, the top one is directly connected to the cpu, the other go through the chipset, so if your only running one i highly recommend attaching it to the top slot. Hope this helped.
A:Answeryes, it supports dual-channel for the slots. just be sure to use A2 and B2. 3600mhz or faster preferred if you find at a good price, but 3200mhz is fine.
