My DFI board had a similar problem, and they told me to upgrade the
bios and set the clock multiplier to 1.5X. It worked for me for some
reason.
Mark Rode wrote:
>
> I have a Tyan Tomcat III....this will officially support 166 and 200MMX
> split voltage.
> I have flashed the board with the latest 4.02 BIOS.
> According to the Tyan BIOS support page for the  Tomcat III...... the
> 4.02 BIOS is the same that is used in the Tomcat IV but the Tomcat IV
> has an additional jumper....J21...which allows it to jumper the 3.5
> frequency.
> Has anyone come up with a work around to achieve 233  jumper settings for
> the Tomcat III ? ?
>
> m
>
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