This RAM memory lot consists of 21 pieces from various brands including DELL, Hyundai, Kingston, SyncMAX, ProMOS, Texas Instruments and N. It includes SIMM, DIMM, RIMM, C-RIMM and SO-DIMM form factors, with DDR, DDR2, SDRAM, RDRAM and EDO DRAM types available. Each module has a capacity of 4MB to 1GB, with multiple bus speeds and models included. This memory lot is perfect for upgrading and enhancing computer performance. Whether you're a professional or a hobbyist, these 21 modules will surely satisfy your needs.