Does the Intel Mac mini have a PCI slot?
No. The Intel Mac mini is designed to be simple, small, and inexpensive, and consequently, there are no PCI slots. If expansion is a top priority, and cost is a factor, you probably would be better served with a computer from the discontinued Power Macintosh G5 or Power Macintosh G4 lines. Site sponsor Operator Headgap Systems specializes in refurbished, and often heavily upgraded, systems capable of running both MacOS X and MacOS 9 applications.