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PCI expansion card for USB 3.0

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Hello. I need to get an expansion card for USB 3.0 that has a 20 pin connector.

My case has 4 USB's in the front with 2 20 pin cables (blue tip) to connect to the mobo but my mobo only has one 20 pin slot and one USB 3.1 front panel connector. I bought an expansion card but it didn't work with Sierra 10.12.6. I want to connect the other 20 pin cable into the expansion slot or maybe get a converter for the 3.1 front panel connector (but don't know if that will work)

Please help
 

pastrychef

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FL1100 chipset based USB 3 cards are natively supported by macOS. Inateck brand cards are very popular among Mac Pro users.
 
Joined
May 17, 2017
Messages
22
Motherboard
Maximus IX Hero
CPU
Intel i7-7700K
Graphics
On-board
Mobile Phone
  1. iOS
FL1100 chipset based USB 3 cards are natively supported by macOS. Inateck brand cards are very popular among Mac Pro users.
They seem to be only for adding USB slots in the back of the case. I need one with 20 pin slot so i can connect the front USB slots to the card. Would you happen to know a brand that has that?
 
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