Kingston, the world's largest independent memory manufacturer, has over 2,000 memory products. In today's performance-driven environment, memory upgrades provide an easy, economical alternative to increase system performance. Every memory product Kingston offers is designed to help you get maximum performance at the best price to you.This memory is designed for the following Dell systems:OptiPlex G1 400 L/M/MT; OptiPlex G1 450 L/M/MT, OptiPlex G1/G1+ 266 L/M/MT;OptiPlex G1/G1+ 300 L/M/MT;OptiPlex G1/G1+ 333 L/M/MT;OptiPlex G1/G1+ 333 L/M/MT (Celeron);OptiPlex G1/G1+ 350 L/M/MT;OptiPlex G1/G1+ 400 L (Celeron);OptiPlex G1/G1+ 433 L/M/MT (Celeron);OptiPlex G1/M 400 M (Celeron);OptiPlex G1/M+ 400 M (Celeron);OptiPlex G1/T 400/450 MT (Celeron);OptiPlex G1/T+ 400 MT (Celeron);OptiPlex GX1 266 L/M/MT;OptiPlex GX1 333 L/M/MT;OptiPlex GX1 350 L/M/MT;OptiPlex GX1 400 L/M/MT;OptiPlex GX1 450 L/M/MT;OptiPlex GX1 450 GX1 500 GX1 550 GX1 600 GX100 433 L/MT/SFF;OptiPlex GX100 L/MT/SFF;OptiPlex GX110 L/MT/SFF;OptiPlex GX200 SDRAM Low Profile Desktop;OptiPlex GX50 SMT, SmartStep 150D.For a complete compatibility list please refer to the original manufacturer's web site.