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On 3 Dec 98 at 11:55, Jacobs, Laurie wrote:
> I have also been trying to overclock a Cyrix PR200 which my
> motherboard (a P5V580-B with 580VPX chipset) will let me use 2 x
> 75mhz or 2½ x 66mhz.
2x75 is normal for a PR200.
> The problem comes when I try to run it at 2½ x 75mhz, The system
> reports it as a Cyrix PR233 and boots OK and works in DOS mode but
> Windows (95) won't load. It just freezes at the splash screen. I
> have tried re-installing W95 but same problem persists.
This is a common point of failure for CPUs that are being
overclocked a little beyond what they're capable of. You *might*
have better luck with additional cooling, but there's (of course) no
guarantee that you'll see any improvement.
> By the way, I can't find a manual for my motherboard, which makes
> changing jumper setting a real pain
This is the EFA "Viking 1" board -- I have one, and so does my Dad.
It has been replaced in stores by the "Viking II" (P5VPX97). You can
find a manual at
http://www.efacorp.com/download/manuals.htm
NOTE: My board and my Dad's both came with manuals whose cover said
"Version 1.1". I have seen a board whose manual said "Version 1.0";
I was unable to get that board to work, and exchanged it for a Viking
II. I did not notice obvious physical differences between these
boards, but I expect the online manual to be 1.1, and if your board
is 1.0 then a few details may not quite match.
David G
The PCBUILD web site always needs good submissions. If
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