Just for fun, I decided to do some benchmarks on Quake 1.

To benchmark, simply open the game, open the console and type "timedemo demo1". Please give results from 800x600 in windowed mode, as fullscreen seems to have VSync enabled.

Quake only uses 1 single core, but it utilizes that single core 100%.

Anyways, here are my results:

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** Demo 1 ** (10 runs)
Lowest FPS: 733
Highest FPS: 743

Not bad