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Simply smart circuitry since 1971

PC Based I/O Cards


Circuit Specialists has an extensive catalog of affordable, high-quality PC-based I/O cards for expanding existing features or for adding new features not offered on the motherboard. Common I/O expansion cards include network, modem, and storage area network (SAN) cards. Take a look at our compact and low-profile expansion cards if you have a smaller chassis. If you're looking for more slots, browse our PCI-to-PCI expansion systems, which allow you to add four or thirteen PCI slots to your computer.