1GB RAM Memory Upgrade for the Acer Aspire AST180 Desktop Systems (DDR2-800, PC2-6400) Guaranteed Compatible for the Acer Aspire AST180 Speed up your system with up to 1152MB of memory! Lifetime Replacement Warranty! Will ship the same day when ordered at or before 4pm EST! All others ship next day! Fully-staffed call center to help with installation or inquiries! Call 866-335-1355 with questions or for help!