4GB KIT (2 x 2GB) For Dell Vostro Desktop Series 220 Mini Tower 220s Slim Tower 320 (All-In-One) 420 Tower A180 Tower. DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory. Genuine A-Tech Brand.<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>4GB KIT (2 x 2GB) DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory</li><li>Genuine A-Tech Memory</li><li>Lifetime Warranty</li><li>Toll Free Technical Support 1-866-557-4527</li><li>Designed For Dell Vostro Desktop Series. (See Compatibility List Below)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/5116sNjoX6L.jpg" noproxy>