This is a 4-port serial expansion card for PCI slots. While PCI Express is the current mainstream, I believe there are still PCs with PCI expansion slots. How about using this for such PCs? This is an unopened (new) item. I purchased this in the past, but it has been stored unopened. I have no use for it now, so I am putting it up for sale. The item will be shipped in a bubble-wrapped envelope.