only 2 ram slots work
Can an NVMe M.2 SSD work in a SATA M. 2 SSD slot? - Quora
Answer (1 of 5): It depends Some M.2 SSD slots work with both NVMe and SATA M.2 SSDs, but some only work with one or the other. M.2 SSD slots which only work with SATA SSDs can usually be identified by their keying. NVMe or NVMe+SATA M.2 SSD slots are keyed at position “M”, while SATA-only M.2 ...
Dell R740 not recongizing memory module in slot A1 - #5 by adrian ...
Are there enough m.2 slots for my use ... Customers report issues with the motherboard's RAM slots, particularly noting that A1 and B1 slots do not work at all.
DDR5 4 dimms on am5 -- what's working, what's not? - L1 Articles ...
Can I put RAM in any slot? ... A common misconception about RAM is that you can put any RAM into any slot. You can do that, but it won’t work, or it will work ineffectively.