Back in the 1980's when PCs were first 4.77MHz and then increased to 8MHz or even 16MHz they started fitting 'turbo' buttons to cases so you could switch down to 4.77MHz to play old PC games.
The games ran too fast at 16MHz.
My new 1989 Viglen 386DX33 came with a turbo button. The machine felt much faster on turbo. Then one day I went inside the case to fit more RAM and discovered the turbo button was not connected to anything.
Biting the hand that feeds IT
