Acer Altos R720 Series - PCI Card Removal and Installation; PCI Riser Assembly Removal and Installation

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11 For installing an optional USB floppy drive, note the location of
the USB connector (C) on the backplane board and refer “To
install a FDD in a converted HDD bay” section on page 56 for
installation instructions.
12 Observe the post-installation instructions described on page 36.