Hewlett Packard 256MB Memory PC2700 DDR- 324700-623 Install easily with the instructions tailored for your machine Rely on HP Pavilion and Compaq Presario memory upgrade kits, which have been qualified and tested in HP Pavilion and Compaq Presario notebook PCs / laptops Compatibility: all HP Pavilion ze4000, ze5000, zt3000, zd7000, zx5000, and zv5000 series, as well as Compaq Presario 900, 1500, 2800, 2100, 2500, X1000, and R3000 series notebook PCs. (Note: This memory will work in ANY notebook PC that can take PC2700 (333 MHz memory). MT8VDDT3264HG-335G3