Product Details The Patriot 512MB Signature DIMM memory delivers high performance and quality memory upgrade solution for DDR based desktop systems. It has been tested at 400MHz and latency of 2.5. Patriot ensures that every module meets or exceeds the industry standard and offers lifetime warranty. Product Features 184-Pin Dual in-line memory module Non-ECC Unbuffered 1 Rank Double-sided module 7.8US Refresh Interval (8192 CYCLES/64MS) Auto and self refresh capability PCB height: 1160 (mil) Serial Presence-Detect (SPD) 100% Tested