IBM 49Y1400 - 16GB Memory Kit. The IBM memory upgrade offerings let you upgrade standard system memory capacity, helping to improve overall system performance.Specification:Product Description - IBM memory - 16 GB Storage Capacity - 16 GB Upgrade Type - System specific Technology - DDR3 SDRAM Form Factor - DIMM 240-pin low profile Data Integrity Check - ECC Features - Quad rank ,registered Supply Voltage - 1.35