IT Jereon, The R620 will support SATA II (3gbps)  and III (6gbps) SSD's, so you shouldn't have an issue there. Before addign the drives though I would make sure the server and controller are up to date.  Also, the part # for the carrier is YXMX6. Hope this helps.
Hi, first time post, and probably not the last one as I am new to this world. I have been given 2x R620 servers to play with, but these don't have any drives. I am researching if I can use non DELL branded SSD as my boot drive, as the official ones are to expensive for my purpose. I believe that the SAS controller is backwards compatible with Sata II and III, and that it can be done, but the server will throwback an error for a non compatible drive. But will this still work when you plan to use it as a boot drive? And to stick with "good maners", can I still use a mirror raid for redundancy? I would also need the 2,5" drive cages, as the slots are now filled with a dummy one.
R620 non DELL boot ssd