ASROCK Rack C2550D4I, Руководство пользователя

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2.5 Jumpers Setup
The illustration shows how jumpers are
setup. When the jumper cap is placed on
pins, the jumper is “Short”. If no jumper cap
is placed on pins, the jumper is “Open”. The
illustration shows a 3-pin jumper whose
pin1 and pin2 are “Short” when jumper cap
is placed on these 2 pins.
USB Selection Jumpers
(3-pin USB_SEL1)
(see p.13 or 15, No. 10)
(3-pin USB_SEL2)
(see p.13 or 15, No. 19)
1-2:
Default
2-3:
USB Selection
Support 2 via rear USB2 ports and 1 via front USB headers con-
trolled by USB_SEL1:1-2 and USB_SEL2:1-2
Support 1 via rear USB2 ports and 2 via front USB headers con-
trolled by USB_SEL1:2-3 and USB_SEL2:2-3