Synology PCIe Gen2 x8 adapter card for dual M.2 SSD slot.Support form factor:For both SATA & NVMe: Broadwell-DE :FS1018, DS3018xs. Denverton: RS2818Rp+, RS2418+( RP+),DS2419+, DS1819+,DS1618+SATA only :Avoton: RS1218+. RS818+(RP+) , DS1517+.SATA after DSM 6.2, NVMe after DSM 7.0 : FS2017 , RS18017xs+, RS4017xs+, RS3617RPxs ;, RS3617xs+, RS3618xs , DS3617xs.