Brand New Sealed Unit * ---Samsung M393A4K40BB0-CPB Server Memory Module ---Form Factor - RDIMM ---Memory Type - DDR4 SDRAM ---Bus Speed - PC4-17000 (DDR4-2133) --- Error Correction - Registered ECC ---Pin - 288-Pin ---Cas - CL15 ---Rank - Rank 2 ---Voltage - 1.2V.