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The 1GB DDR2 533MHz SO-DIMM Memory Module from OWC/Other World Computing is designed for Apple's PowerBook G4 (15" and 17" DL Super Drive) models, and is also compatible with select Intel/AMD-processor-based PC laptops. This module fully meets Apple's specifications, with special attention to proper thermal specifications, and is also fully compliant with JEDEC specifications. This memory module is non-ECC and features a CAS latency of 4.