1GB STICK For Dell Optiplex Series 170L 170LN GX170L GX270 (Desktop and MiniTower) GX270 (Small Form Factor) SX270. DIMM DDR NON-ECC PC3200 400MHz RAM Memory. Genuine A-Tech Brand. 1GB STICK DIMM DDR NON-ECC PC3200 400MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Optiplex Series. (See Compatibility List Below)