What is the difference between ISA and PCI?
ISA is an old technology that has been replaced by PCI, PCIe and so on. ISA slots are usually black, long and the gold contacts are large. PCI slots are light-colored, usually white, shorter and smaller.
ISA operates at 8 MHz clock rate and has a maximum data rate of 8 MBp while PCI operates at clock speeds of 33 or 66 MHz. At 32 bits and 33 MHz, a PCI bus has a maximum data rate of 132 MBps
ISA bus is not used in modern computers, as mentioned before, it was replaced by the PCI, AGP, and USB.