Tested working in both Mac Pro and PC

Price is for one card. Please review the photos for examples of the condition.

Your Mac Pro or PC needs at least one PCI-E slot

I think this is the original product link:

https://www.sonnettech.com/product/legacyproducts/allegroprousb3pcie.html

Please do your own research to make sure it is compatible with your system as I will not be responsible if it is not compatible with your system.

If you have any questions, please feel free to ask.