Z210 (4 slots, max 8gb per slot, 32gb total). Z220 (4 slots, max 8gb per slot, 32gb total). Z420 (8 slots, max 8gb per slot, 64gb total). Z230 (4 slots, max 8gb per slot, 32gb total). 8gb kit (2 x 4gb) DDR3 PC3-12800E 1600mhz ECC-U DIMMs 1.5v.
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