In worst case, I just treat the extra 2 ports as backup ports.

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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions.

In order to get 10Gbps per port we need a 2-port 4x card or 4-port 8x card.

Its a 4x card though so unfortunately itll only be 5Gbps per port in a cMP due to PCI 2.0 bandwidth limitations.

I didnt have any issues installing it in my Mac Pro 2009 - the type C connectors do seem a bit low but I havent had any issues connecting anything.

Unfortunately, I dont have any USB 3.1 gen 2 hardware to test, but its Im having no trouble with my USB 3.0 hub (using a type-C to type-B cable ).

My USB3.0 sandisk flash drive tops out at 200 mBsec like it does when connected to a regular 3.0 port, so at least nothings slowed down.

Im running the latest version of high Sierra (10.13.4 as of this post) and Windows 10 (whatever the latest stable release is, no insider build) in UEFI mode (clean install to separate SSD, no bootcamp).

The only issue thus far is that my Anker USB3.0 hub (connected via this adaper cable ) doesnt work 100 when coming out of sleep in Windows 10.

My Sandisk USB3 flash drive works fine and my Qi charger works fine, but my Xbox 360 wireless receiver will only come back if I plug into the built-in USB2.0 ports.

Cant tell if its an issue with the hub or the receiver.

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To update from my post in November - no major issues using this card so far.

Im looking for a USB express card with at least 4 usb ports that works in High Sierra.

I recently bought an Inateck kt4001 because I had seen some reports of it working in High Sierra, but I cant get it to work.

Any suggestions for a compatible card would be greatly appreciated.

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I was thrown off because it says on amazon for the kt4004 card: Incompatible with Mac OS X 10.10 Yosemite or Above.

Thanks --------------- EDIT: This card is compatible with High Sierra.

I think each port can still deliver 10Gbps individually, but just cant do that simultaneously.

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