OWC Mac Memory 4GB 1066Mhz DDR3 SODIMM Mac MemoryFEATURES Technology: DDR3 SDRAM Density: 4GB (4096MB) RoHS: Yes Pin Count: 204 pin Op. Temp.: 0C to +85C Data Rate: DDR3 1066 Speed: PC3 8500 CL: CL = 7 Cycle Time: 1. 875ns Voltage: 1. 5V ECC: Non ECC Module Ranks: Dual Rank Register: Non Parity Low Noise 8 Layer PCB Meets and or Exceeds Apple Intel Specifications Fully compliant with JEDEC specifications