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- 2-Port Super-Speed USB 3.0 Card - PCI Express Card Windows 7 and Vista In Stock & ready to ship. The 2-Port USB 3.0 card provides a reliable PCI solution for supporting many popular devices, including digital video camcorders, hard disks, Pen Drives, CD-R, CD-RW, Camera and high-resolution color printers.
- These cards let you add USB ports to PCI Power Macs and clones. Specifications are virtually identical: two USB ports, 500 mA power to each port, requires PCI Mac or clone with Mac OS 8.1 or later (8.6 or later recommended for best USB support). All cards ship with Mac drivers or work with Apple's drivers.
- Nov 18, 2013 Inateck USB 3.0 PCI-X card for MAC Pro 2008-2012 systems. Install and speed compare - Duration: 3:25. Tech Dripper 25,253 views. Is an old Mac Pro Worth It? Watch this Review.
- Add 7 additional device ports to your PC by upgrading your PCI Card. The Ultra 7-Port PCI Card features 3 external and 1 internal USB 2.0 ports. These ports support data transfer rates up to 480Mbps. Ultra's 7-Port PCI card also features two external 4pin/6pin and 1 internal 6pin IEEE-1394 FireWire ports.
- Dec 22, 2019 The Sonnet Allegro USB-C 4-Port PCIe Card (USB3C-4PM-E) has two USB controllers connected to a PCIe switch with an x4 upstream connection (similar to the CalDigit FASTA-6GU3 Plus). The Sunix UPD2018 and Delock 89582 have a DisplayPort input to support USB-C alt mode, but they are PCIe 3.0 x1 which will half the max bandwidth when used in a PCIe.
Supports USB 3.1 peripherals on a Mac or Windows PC when installed in a Thunderbolt 2 or Thunderbolt 3 PCIe expansion system (5) macOS 10.12.6+ (3) Windows 10 Build 1703 or newer (64-bit edition) Technical Notes. Product complies with USB 3.2 Gen 2 specification, which supersedes USB 3.1 Gen 2. Product package may still list USB 3.1 Gen 2.
Q: I have installed a USB PCI card in my beige PowerMac G3 (or any other Power Macintosh computer without built-in USB ports) running Mac OS 9.2.2, but the card is not working / not recognized by the system. What can I do?
A: This problem is often caused by one of the following three issues -
1.) A Mac OS installer only installs the USB extensions that are necessary to use an USB adapter card if USB ports are present on the computer at the time of installation. This would apply if the USB PCI card was installed after installing the operating system.
2.) Several reports in the past have indicated that the USB extensions that come with Mac OS 9.2.2 may not always work on computers without built-in USB ports.
3.) USB Adapter Card Support 1.4.1 is not intended for use with Mac OS 9.1 or higher. If the 1.4.1 USB extensions have been installed anyway, this can be the reason why the USB card is not working. (From the ReadMe-document: 'Mac OS versions 9.1 and later include a later version of this software. Installing USB Adapter Card Support 1.4.1 over Mac OS 9.1, 9.2 or later could result in the USB adapter card not working.')
The common solution to the three issues above is to install the following USB extensions (that were included in Mac OS 9.1):
- HID Library 1.4.6
- Serial ShimLib 1.4.6
- USB Device Extension 1.4.6
- USB Mass Storage Support 2.0.9
- USB Software Locator 1.4.6
- USB Support 1.4.6
You can use a utility called TomeViewer to extract these extensions from either the Mac OS 9.1 download update or a (retail) Mac OS 9.1 CD.

To install them, open System Folder > Extensions, move any earlier or later versions of these extensions that might be present to the Desktop (you can delete them once your USB card is working) and drag-and-drop the extracted extensions to the Extensions-folder.
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Then restart the computer to activate the new extensions.
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If the USB card is not recognized after installing the new extensions, resetting the PRAM and/or resetting the CUDA chip might help.
Joerg