2GB KIT (2 x 1GB) For Acer Aspire Desktop ASE380-ED421M ASE380-ED522M AST180-EA381M AST180-ES340M AST650-U-C3601 E380 E380-ED401A E380-ED421M E380-ED422A E380-ED500U E380-ED522M E380-UD500A E500 E500A E560 E650 L300 L600 M1641 M5641 T180 T180-EA381M T180-ES340M T630 T650 T650A T680 Z800. DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory. Genuine A-Tech Brand. 2GB KIT (2 x 1GB) DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Acer Aspire Desktop. (See Compatibility List Below)