This document describe Value RAMs 4GB (512M x72-bit) PC2-5300 CL5 SDRAM (Synchronous DRAM) Fully Buffered ECC dual Rank Memory Module. this module is based on eighteen stacked 512M x 4-bit( Thirty-six 256M x 4-bit) 667 MHZ DDR2 FBGA Components.The Module also includes an AMB Device (Advance memory Buffer). the electrical and mechanical specification are as follows Features * FBDIMM Module:240-pin * JEDC Standard's: R/C H or E * Memory Organization:2 rank of x4 devices * DDR2 DRAM Interface: SSTL_18 DDR2 Speed Grade: 667 Mbps Cas Latency:5-5-5 Module Banwidth:5.3 GB/s DRAM: VDD =VDDQ=1.8V AMB: VCC= VCCFBD=1.5V EEPROM: VDDSPD=3.3V (typical) Heat Spreader : Fully DIMM Heat Spreader (FDHS) PCB Height:30.35mm,double-side ROHS Compliant Memory Size 2GB Memory Speed 667 Mbps Memory Standard DDR2 Total Price Rs. 16300/-