We Explain Registered and Unregistered Memory | Server Factory Explains - YouTube
CMS 8GB (1X8GB) DDR3 10600 1333MHZ ECC Non Registered DIMM Memory Ram Upgrade Compatible with Supermicro® MBd-X9Scl-F-B, X9Scl-F, B9Dre Motherboard for Server Only - B121 at Amazon.com
CMS 32GB (4X8GB) DDR3 12800 1600MHz ECC Non Registered DIMM Memory Ram Upgrade Compatible with Supermicro® X10Sll-F, X10Sll+-F, X10Slh-F Motherboard for Server Only - B90 at Amazon.com
processor - Motherboard recommendation for CPU and ECC-registered buffered memory combination - Hardware Recommendations Stack Exchange