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The logic board supports an internal hard disk that uses the standard Ultra DMA/66 (ATA-5) interface. The computer comes with an Ultra DMA/66 hard disk or a Wide Ultra 2 hard disk installed in the third drive bay.
The internal hard disk has a 40-pin connector and a separate 4-pin power connector. An 80-conductor high-density cable with a 40-pin connector is attached to the main logic board. To provide improved signal quality, the 80-conductor cable has ground lines separating the signals on the 40-pin connector. The power cable is attached directly to the power supply.