That is my understanding as well - it will not work for SAS drives but perhaps it would if you only used SATA drives?I think I already know the answer to this question, but does anyone know if what OP seemed to imply is true? It seems as though he's saying that I could, with a SlimSAS x8 (SFF-8654) to 2x MiniSAS (SFF-8087) cable, connect my H12SSL-NT motherboard directly to my BPN-SAS2-846EL1 SAS backplane? This seems unlikely to me as the motherboard manual specifically states that these ports, via a jumper, can only be used for either NVMe or 8 SATA ports with a breakout cable. It seems that you'd need a SAS controller which the NT variant doesn't have. Am I right in my assumption that I cannot use these SlimSAS ports to connect my SAS backplane, or is what OP seems to say right?