2GB 667MHz DDR2 ECC CL5 DIMM Intel Validated...Standard 256M X 72 ECC 667MHz 240-pin Unbuffered DIMM (SDRAM-DDR2, 1.8V, CL5). 256M x 72-bit 2GB (2048MB) DDR2-667 CL5 SDRAM (Synchronous DRAM) ECC memory module. The components on this module include eighteen 128M x 8-bit (16M x 8-bit x 8 Bank) DDR2-667 SDRAM in FBGA packages. This 240-pin DIMM uses gold contact fingers and requires +1.8V.