The Patriot Signature DDR2 667MHz Non-ECC Unbuffered SO-DIMM is designed to support high performance notebook and mobile systems. The Patriot SO-DIMM memory modules are fully tested and validated at 667MHz (PC2-5300) to ensure reliable performance and compatibility. These memory modules are perfect to meet the needs of those requiring memory upgrades. Features PC2-5300 (667MHz) Data Rate 200-Pin Dual in-line memory module Non-ECC Unbuffered 1 Rank Double-sided module 7.8US Refresh Interval (8192 CYCLES/64MS) 1.8V Power Requirement Auto and self refresh capability PCB height:1181 (mil) Serial Presence-Detect (SPD) 100% Tested Lifetime Warranty RoHS Compliant