› Interactive Solutions 4GB (2x2GB) Memory RAM dimm Compatible with Dell OptiPlex 990 DT / MT / SFF, U

4GB Total memory using 2pc of 2GB 1333MHz Module 240pin dimm DDR3 10600. Lifetime warranty for exchange. We don't use Generic modules to avoid incompatibility issues. Guaranteed to work or you get all of your money back including shipping. Features Compat