This is the corner of the shop for the parts that make a build actually fit together: add-on cards and adapters that add USB, serial, parallel or FireWire ports to a desktop, plus the internal power and connection cables you need to finish the job. You will find USB-to-serial converters, PS/2-to-USB adaptors, PCI and PCIe cards from Approx, StarTech.com and InLine, PCI-E power cables from Silverstone and Phobya, and mobile phone cables from Approx. If your motherboard is short on a specific port or your PSU does not reach where it needs to, this is where you solve it. We keep prices competitive and offer secure shipping, with advice available if you are not sure which adapter or cable matches your setup.