Mushkin 991148 DDR1 UDIMM (2x512MB) 1GB PC2700 Unbuff 2.5-3-3-7 NONE 2.5V 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. Dual Channel Kit Engineered for dual-channel architecture. Lifetime Warranty Quality guaranteed - we offer a lifetime warranty on this product and genuine, unmatched service and support. Type: DDR Voltage: 2.5V Speed Spec: PC2700 Frequency: 333MHz Capacity Kit Type: Dual Kit Module Size: 512MB Module Build: 64Mx64 Chipset Density: 32Mx8 Timings tCL: 2.5 tRCD: 3 tRP: 3 tRAS: 7 Cooling Technology Heatsink: NoneFEATURES: