4pcs of 8GB DDR3 PC3-10600 ò CL9 ò Dual Ranked ò x4 based ò Registered ò ECC ò DDR3-1333 ò 1.5V ò 1024Meg x 72 ò Lifetime warranty 2pcs kit 30 day money back warranty by Computer Memory Solutions Manufactured byComputer Memory Solutions Compatible with ThinkStation D20 4155, 4158, 4218-xxx
Maximum Memory: 24GB ECC UDIMMs 48GB Reg
ECC RDIMMs Expansions: 3 Socket (s) per CPU 6 Socket (s) using two
CPUs ThinkStation C20 Important: Our DDR3-1333 modules automatically clock down to 1066MHz and 800MHz depending on which Intel Xeon model is used. This system supports either Registered ECC or Unbuffered ECC memory. Mixing Registered ECC and Unbuffered ECC modules is not supported within this system.