Crucial Technology 4GB 240-Pin UDIMM DDR3 Desktop Memory Module， 1.35V， CL=13， Unbuffered， NON-ECC， 1866 MT/S Speed， 512Meg x 64<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Memory Size:4 GB / Memory Technology:DDR3 SDRAM / Memory Voltage:1.35 V / Memory Speed:1866 MHz</li><li>Error Checking:Non-ECC / Signal Processing:Unbuffered / CAS Latency:CL13 / Number of Pins:240-pin</li><li>Width:1.2" / Length:5.3"</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41nYz0QK-yL.jpg" noproxy>