Samsung 4GB PC3-12800 DDR3-1600MHz non-ECC Unbuffered CL11 240-Pin DIMM M378B5273DH0-CK0<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Memory Type DDR3 SDRAM Capacity 4GB Pins 240 Pin Bus Type PC-12800， Non-ECC Cycle Time 1.5ns Cas CL11 Data Transfer Rate 1600Mhz Memory Clock 200Mhz Rank Rank 2 Voltage 1.5</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41z8YB29OFL.jpg" noproxy>