This is an internal 500GB hard drive replacement and or upgrade for an iMac G4 and PowerMac G4. Specifications: Capacity: 500GBSpindle Speed: 7,200 RPMInterface Type: IDE / ATA (3.5")Disk Size: 3.5"x1.0" (Low Profile Hard Drive)Sustained Throughput (MBps):Average Seek Time (read/write ms):Electrical Interface Speed: EIDE / Ultra ATA/133 - 133MBpsOn-Board Cache: 8MB

This is an internal 320GB IDE 3.5" 7200RPM hard drive replacement and or upgrade for various Mac desktop models. Specifications: Capacity: 320GBSpindle Speed: 7,200 RPMInterface Type: IDE / ATA (3.5")Disk Size: 3.5"x1.0" (Low Profile Hard Drive)Sustained Throughput (MBps):Average Seek Time (read/write ms):Electrical Interface Speed: EIDE / Ultra ATA/133 - 133MBpsOn-Board Cache: 8MB

HP-Compaq 40GB 5.4K RPM 3.5 Inch Internal Ultra ATA-100 Desktop Drive. New Pull.

This is an internal 250GB hard drive replacement and or upgrade for various Mac desktop models. Specifications: Capacity: 250GBSpindle Speed: 7,200 RPMInterface Type: IDE / ATA (3.5")Disk Size: 3.5"x1.0" (Low Profile Hard Drive)Sustained Throughput (MBps):Average Seek Time (read/write ms):Electrical Interface Speed: EIDE / Ultra ATA/133 - 133MBpsOn-Board Cache: 8MB

Overview The JM20330 is a single chip solution for serial and parallel ATA translation. It includes the Serial ATA PHY, Link, Transport, and Parallel ATA (application layer) controller. The Serial ATA physical, link, and transport layers are compliant to Serial ATA 1.0 JM20330 supports a 1.5GHz data rate, and scalable to 3.0 GHz data rate by directly doubling the internal clock source. The application layer supports both the ATA register command set and PACKET command set, which could drive both Hard Disk Drive and ATAPI Optical Storage such as CR-ROM, CD-RW, DVD-ROM, DVD-RW, etc. The Serial ATA and the Parallel ATA application layer support both host and device operation and can be configured through a single pin. Feature Compliance Serial ATA 1.0 Specification compliant Overall ... Less