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My Abit BH6 won't boot up. Which voltage for correct CPU?

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First post, by PaddyWi

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Hi guys,
I own an Abit BH6 Revision 1.02 with newest BIOS version "SS".

It struggles running Coppermine Pentium 3 CPUs. I tested a 933 Mhz and a 1000 Mhz, both with a FSB of 133 Mhz. None boots up.

I can get my hand on a P3 500/100 with 2.0 Volt or a P3 650/100 with 1.65 Volt.

Does this board wants CPUs with a higher or lower Voltage?

Or: Is there a trick to force the CPU into running a FSB of 66 Mhz or 100 Mhz.
Since there are no jumpers I can't find how - the ASUS P2B-F runs both CPUs just fine.

Thanks for your support!

Reply 1 of 4, by sunkindly

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AFAIK 1.02 doesn't support Coppermines above 700MHz, only the 1.1 and 1.2 revisions.

Also, as for the FSB with CMOS reset the BIOS software will default to the safest configuration which would be 66. But you can't set it without getting into the BIOS settings unfortunately.

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Reply 2 of 4, by sfryers

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A 933Mhz 133FSB P3 has a 7x multiplier; the same as a 700MHz 100FSB P3, so I'd have thought it should boot just fine at 66 or 100 MHz FSB. In my experience the BH6 is rather hit and miss with >100Mhz FSBs though, and the earlier revisions aren't rated to supply sufficient stable power to the later, higher-clocked Coppermines.

The board should boot at a safe FSB if the CMOS has been reset, which you can do manually using the jumper or by removing the coin cell battery for a few minutes. Testing with those slower CPUs would probably be helpful.

Are you using Slot 1 CPUs or Socket 370 versions with a 'slotket' adapter?

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Reply 3 of 4, by PaddyWi

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I am using Slot 1 CPUs. A Celeron 333 Mhz with a FSB of 66 boots just fine.

Reply 4 of 4, by PC Hoarder Patrol

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PaddyWi wrote on 9 minutes ago:

I am using Slot 1 CPUs. A Celeron 333 Mhz with a FSB of 66 boots just fine.

There's a modded v55 BIOS by @myne which may get your coppermine 933 working (at the foot of the post)...Re: AB-BH6 CPU help

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