Full Details on Amazon.com : http://www.amazon.com/gp/product/B008IO0IU2?tag=tsukuyomi-20<br /><br />4GB DDR2 Memory RAM Kit (2 x 2GB) for Acer Aspire 3690 4520<br /><br />Memory Size 4GB 2 x 2GB There are two 2GB DDR2 memory modules in this kit <br />Memory Type DDR2 SDRAM <br />Number of Pins 200 <br />Memory Speed PC2-5300 DDR2-667 667 MHz <br />LIFETIME WARRANTY and free Tech Support
