msi slotBest AMD AM4 B550 ATX motherboard, lhtning PCIe 4.0, lhtning M.2, Extended heatsink, USB 3.2 Gen 2, M.2 heatsink, powerful overclocking, MSIEnable XMP for that. Then, even though the only proper confuration to use is slots A2+B2, you can test each slot with a single module individually. The idea is to see if