USB 3 card for Sierra

[filmafx]

Hi, I have an older gigabyte MB that has a USB 3 that is no longer driver-supported in seirra.

can anyone recommend a USB 3 - type -A connector card that works with Sierra?

the usb3 cards recommended in the buyer's guide are mostly out of stock...

 

[pastrychef]

FL1100 chipset based USB 3 cards are natively supported by macOS.

Something like this should work well:
Amazon.com: Inateck 2-Port PCI-E USB 3.0 Express Card, Mini PCI-E USB 3.0 Hub Controller Adapter with Internal USB 3.0 20-PIN Connector - Expand Another Two USB 3.0 Ports - No Additional Power Connection Needed: Computers & Accessories