Buy Kingston KF318C10BBK2/8 8GB DDR3 Memory Kit Capacity: 8GB (2 x 4GB modules) Type: DDR3 SDRAM Speed: DDR3-1866 / PC3-14900 Frequency: 1866 MHz Latency: CL10 Voltage: 1.50 V Form Factor: 240-pin DIMM Buffered: Unbuffered Warranty: Lifetime warranty