Thunderbolt support (for PCIe devices and displays - without hot-plug support) can be initiated by running Windows, then warm-booting into macOS.

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This thread refers to PCIe cards for adding USB 3.0 and 3.1 to classic Mac Pros.

This occurs even with Apples built-in USB 3.0 ports, so it isnt your card.

This is 5 Gbps using 8b10b encoding which means bytes are transferred at 4 Gbps or 500 MBs (not including USB protocol overhead).

This is similar to PCIe 1.0 x2 or PCIe 2.0 x1 (not including PCIe protocol overhead).

This means there are separate send and receive data lines.

USB 2.0 and earlier are half-duplex (there is only one data line).

Each data line uses two pinswires (USB signals are transmitted using differential signaling on a.

The manufacturer claims it was specifically designed for the Mac Pro and supported under Mac OS 10.10 or later.

Oddly enough, it also includes a GPU dual 6 to 8 pin GPU power supply cable, which is not needed by the USB card, but never hurts to have a spare.

The new model works with all USB devices, not just storage devices.

It doesnt have the reduced speed problem that the old model had.

This is 10 Gbps using 128b132b encoding which means bytes are transferred at 9.697 Gbps or 1212.1 MBs (not including USB protocol overhead).

This is greater than PCIe 1.0 x4 and PCIe 2.0 x2 (8 Gbps or 1000 MBs) and PCIe 3.0 x1 (7.877 Gbps or 984.6 MBs) (not including PCIe protocol overhead).

Otherwise, youll only see up to approximately 6.1 Gbps or 765 MBs if you are limited by PCIe (as is the case with PCIe 1.0 x4, PCIe 2.0 x2, or PCIe 3.0 x1).

This is not enough for full SS.

A PCIe 1.0 slot will half the max bandwidth.

Some PCIe 1.0 slots (such as in the Mac Pro 2008) do not support x2 and will thus have a quarter of the max bandwidth.

It is an x4 card which can allow more than SS even in a PCIe gen 1 slot.

The x4 connection is provided by a PCIe switch which is used for the ASM1142 and an eSATA controller.

ASM3142 pictured.

Are there older revisions with the ASM2142.

The controller uses a PCIe 3.0 x4 connection which can give it superior performance to any USB card using the ASM1142 even at the PCIe 2.0 x4 speed of the Mac Pro.

A jumper wire is used to force the USB controller to always be visible even when no USB devices are connected (similar to Force Power in PC BIOS settings).

USB 2.0 support (optional) requires a connection to a USB port that supports USB 2.0 (one USB 2.0 port per Thunderbolt port).

Usb 2.0 Drivers For Mac