I'm only getting 630Mbs on the oculus link test. Anyone have any idea why? Tried it in both a 16x and 4x slot

The actual transmission speed may be limited by the connected device. Additionally, the Thunderbolt 3 device connected to this expansion card is only compatible with a 10Gbps rate.

Support UASP protocol?

yes, it is easy to install and works as advertised

Questions & Answers: 20 Gbps PCI-Express Type C Expansion Card, ORICO PCI-Express to USB 3.2 Gen 2x2 (20 Gbps) for Windows 7/8/10/Linux/MAC OS, Compatible Slot: PCIe x4 (3.0), PCIe x8, PCIe x16

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Item#: 9SIA1DSBWH7386
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20 Gbps PCI-Express Type C Expansion Card, ORICO PCI-Express to USB 3.2 Gen 2x2 (20 Gbps) for Windows 7/8/10/Linux/MAC OS, Compatible Slot: PCIe x4 (3.0), PCIe x8, PCIe x16

Up to 20Gbps.
15PIN Power Supply Port Powerfu.
Add an USB 3.2 Gen 2X2 type-C (20 Gbps) ports to new PC or older PCIe-equipped desktop computer.
Compatible slot: PCIe x4(3.0), PCIe x8, PCIe x16,Compatible with Windows 8/10/Linux Kernel, No Driver Needed. (Do not support Windows 7)

$49^.99 –