512MB Upgrade for a Dell Inspiron 5100 Series System (DDR PC2700, NON-ECC, ) 200-pin SODIMM DDR333 DDR PC2700 Unbuffered, NON-ECC, DDR333, 2.5V, The only brand of memory upgrade available directly from a DRAM manufacturer, tested to meet the most stringent industry specifications Install it yourself in about 15 minutes. The same top-quality memory that the worlds largest computer manufacturers install in the systems they sell