SSD Tray Compatibility: For Dell Precision Towers and Dell PowerEdge Towers, SAS solid state drives require a RAID Controller to function 2.5" Tray: R340 8 Bay SFF, R440 8 Bay SFF, R440 10 Bay SFF, T440 16 Bay SFF, T640 32 Bay SFF, T640 16 Bay SFF, R640 10 Bay SFF, R740 16 Bay SFF, R740xd 24 Bay SFF, R940 24 Bay SFF, M640, FC640, R6515 8 Bay SFF, R6525 8 Bay SFF, R7515 24 Bay SFF, R7525 24 Bay SFF, R7525 16 Bay SFF, R7525 8 Bay SFF, R350 8 Bay SFF, R450 8 Bay SFF, R550 8 Bay SFF, R550 16 Bay SFF, C6525 24 Bay SFF 3.5" Tray with 2.5" to 3.5" Adapter: R240 4 Bay LFF, R340 LFF, R440 4 Bay LFF, T440 4 Bay LFF, T440 8 Bay LFF, R540 12 Bay LFF, R540 2 Bay LFF, R640 4 Bay SFF, R740xd 12 Bay LFF, R6515 4 Bay LFF, R6525 4 Bay LFF, R7515 8 Bay LFF, R7515 12 Bay LFF, R7525 12 Bay LFF, R7525 8 Bay LFF, R250 2 Bay LFF, R250 4 Bay LFF, R350 4 LFF, R450 4 Bay LFF, R550 8 Bay LFF, C6525 12 Bay LFF