1),RAM type: DDRII 533/667/800 2),Total memory: 512MB/1GB 3),Bus speed: 533/667/800 MHz 4),Operating system compatibility: PC 5),Memory bandwidth: PC-4300/5300/6400 6),Voltage: 1.8 V 7),Warranty: 5-year 8),Programmable/CAS latency (CL): 5 9),240 pin