The PC turbo button and LED clock speed display were common features on early personal computers. Wanting to add a little retro chic to his modern battle-station, [Matthew Frost] assembled a ...

The PC turbo button and LED clock speed display were common features on early personal computers. Wanting to add a little retro chic to his modern battle-station, [Matthew Frost] assembled a charmi… ...

The lock key is presumably for the power button, so you have to turn it while you switch it on or off. But it could also be a chassis lock. There's also a Reset and Turbo button (your guess is as ...

The "Turbo" button was very common in 286 and 386 PC clones, less common in 486 PCs, and almost extinct by the time Pentium processors became mainstream in the late 1990s.