Sometimes the BIOS High/ Low speed options are just remnants from an older board setup that should've been hidden from view.

I've seen these settings, and even Turbo headers, on Slot 1 440BX boards. For Intel chipsets, the latest I have with a working Turbo header for Socket 7 is 430FX. IIRC, that was the last Intel chipset with such functionality.

Well it is simply because the turbo functionality on pentium board is changing the FSB. As the P75 already runs at 50 MHz FSB you can not switch to a lower FSB. (Basically turbo is changing FSB from 50 MHz to 50 MHz).

elianda wrote:

Well it is simply because the turbo functionality on pentium board is changing the FSB. As the P75 already runs at 50 MHz FSB you can not switch to a lower FSB. (Basically turbo is changing FSB from 50 MHz to 50 MHz).

Hmm, thank you! I'll check it out. Though in that case turbo is fairly useless to me and I miht want to go back to my Pentium 60 board — it can basically go as low as a 386.