Mushkin 991784 DDR2 SODIMM 2GB PC2-4200 SODIMM 200p 4-4-4-12 NONE 1.8V Compatible Frequency This product is engineered to operate at the optimum frequency for compatibility with your system. Compatible Timings This product is programmed to use timings that offer maximum compatibility with your system and original memory. Lifetime Warranty Quality guaranteed - we offer a lifetime warranty on this product and genuine, unmatched service and support. Type: DDR2 SODIMM Voltage: 1.8V Speed Spec: PC2-4200 Frequency: 533 Capacity Kit Type: Module Module Size: 2GB Timings tCL: 4 tRCD: 4 tRP: 4 tRAS: 12 Cooling Technology Heatsink: None