256MB 200-pin DDR SDRAM SO-DIMM Memory Module, 266MHz (PC2100), 2.5V, 32MX64, CL 2.5 ...This module is JEDEC-standard 200-pin, small-outline, dual in-line memory module. A 256 byte serial EEPROM on board can be used to store module information such as timing, configuration, density, etc. This memory module is 256MByte and organized as a 32MX64 array using (8) 32MX8 (4 internal banks) SDRAMs in TSSOP II packages. All memory modules are fabricated using the latest technology design, six-layer printed circuit board substrate construction with low ESR decoupling capacitors on-board for high reliability and low noise.