ALL-IN-ONE vs. DESKTOP PC
All-in-one computers are really just a style of desktop computer system. They still have the same requirements in terms of features and function. The only difference is the number of components. All-in-ones have a single box that is the display and computer versus the desktop that is comprised of the computer case plus a separate monitor. This gives the all-in-one computer system a smaller overall profile than a desktop computer system.
One might counter by bringing up the latest small form factor computers such as the Apple Mac Mini. These new class of extremely small computers that can easily sit beneath or behind a standard desktop display. The all-in-one PC still has an advantage over these systems in the number of required cables. Since the monitor is integrated into the system, there isn't a need for a monitor cable or separate display power cord. This reduces the clutter on, underneath or behind a desk.
Desktop do have some distinct advantages over the all-in-one PCs though. Due to their small sizes and need for lower power and less heat generating components, many all-in-one PCs feature mobile designed components including processors, memory and drives. All of these help make the all-in-one small but they also hinder the overall performance of the system. Typically these laptop components will not perform as well as a traditional desktop. Of course for the average user, many of these low powered mobile parts will often prove to be fast enough.
Another issue that all-in-one computers have is their upgradability. While most desktop computer cases can be easily opened by the consumer to install replacements or upgrades, all-in-one systems tend to restrict access to the components due to their small nature. This typically only limits the systems to having their memory upgraded. With the rise of high speed external peripheral connectors such as USB 3.0, internal upgrade options are not as critical as they once were but still still make a huge difference when it comes to some components such as the graphics processor.
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