Improve your notebook's speed and performance with a larger memory module. You'll enjoy faster multitasking, gaming and web surfing.-128 MB of memory to improve performance-Operates at a speed of 100 MHz-128MB 144pin SDRAM SODIMM 16Mx64 non ECC gold leads unbuffered 3.3 volts PC100 spec 100 Mhz with SPD CAS 2 latency 8 chip count 1.25 inches tall uses 8x16 dram Compatible Models:Dell Inspiron: 2500,3800,4000,5000eDell Latitude: CP,CPx,LS