Corsair value select line provides quality tested compatible desktop memory at competitive prices the value select line is qualified for major current desktop systems general storage capacity 2 gb 2 x 1 gb enviroment desktop tower computer error checking non ecc memory specs supply voltage 18 v memory speed 533 mhz pc2 4200 form factor dimm 240 pin technology ddr ii type dual channel memory specification compliance pc4200 cas latency cl4 registered or buffered unb