Ddr2 ram 240 pin series mushkin silverline series capacity 4 096 mb bus clock speed 667 mhz memory latency cl 5 5 5 15 specification pc2 5300 dual channel kit memory kit type 2 x 2 gb 2048 mb voltage 18 v with heatspreader max voltage 19 v ram operation mode dual channel form factor 240 pin manufacturers warranty lifelong