| 摘要 |
A connecting apparatus comprises a riser card ( 10 ) and a slot ( 20 ). The riser card comprises a PCI-X slot ( 13 ), a PCI-E slot ( 11 ), a first connector ( 15 ), a second connector ( 17 ) and a third connector ( 19 ). The first connector set a serial of PCI-X signal pads ( 151 ) on one side thereof. The second connector is adapted to provide power and ground signals. The third connector set a serial of PCI-E signal pads ( 191 ) on the same side thereof as the first connector. The slot is defined on a circuit board for the riser card inserted therein. The slot comprises a first portion ( 21 ) and a second portion ( 23 ) coupling to the second connector. The first portion comprises a first side with a series of PCI-X signal pins ( 211 ) coupling to the serial of PCI-X signal pads of the first connector, when the riser card is inserted into the slot in a first direction with the first connector inserted into the first portion. The first portion comprises a second side with a series of PCI-E signal pins ( 191 ) coupling to the serial of PCI-E signal pads of the third connector, when the riser card is inserted into the slot in a second direction which is reverse to the first direction with the third connector inserted into the second portion.
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