Hi Pete,
I am writing this from a 486DX2-66 machine. I
have 2 identical 486 mobos. They both had 486DX-50 CPUs.
I changed this one to 486DX2-66. This machine seems much
faster displaying graphics. Just as your manual says I
had to change a jumper to 33hz when I installed this CPU.
I also run a Gateway 2000(was a 4sx-33) which has an
IBM Overdrive CPU (PODP5V63)(Pentium overdrive upgrade).
The Gateway is the slowest machine on the internet.
I don't have TFM for any of these machines so it may
be something isn't set right on the Gateway 586 overdrive
machine.
I don't know anything about the Evergreen upgrade chip.
Eric
Roger Turk wrote:
>Pete,
>Before you sink money into a new oscillator and a new FPU, check out
>Evergreen Technologies' 586. (www.evertech.com)
>Roger Turk
>Tucson, Arizona USA
>
>Pete Randolph wrote:
>
>>>From the mobo manual (verbatim):
>---------------------
>* Uses Intel, AMD, Cyrix 80386DX running at 25/33/
> 40MHz, or uses Intel 80486SX running at 20/25/
> 33MHz, or 80486DX CPU running at 33/50MHz, or
> 80486DX2 running at 50/66MHz
>* Uses Intel, Cyrix 80387 running at 25/33/40MHz.
> Uses AMI BIOS: 27512-20 (1)
>* Uses UMC chipset
>* 8.33/10/12.5MHz bus speeds (for 80486-50)
>(etc., etc...)
>"Note that when upgrading the CPU, you must also change the osillator."
>386DX-25, 50; 386DX-33, 66; 386DX-40, 80
>486SX-20, 40; 486SX-25, 25; 486SX-33, 33
>486DX-33, 33; 486DX-50, 50
>486DX2-50, 25; 486DX2-66, 33
>-----------------------------------
>I think my best "mfg reccommended" option is to drop the oscillator to
>33Mhz and replace the CPU with a 486DX2-66.
>NB: The CPU currently on the board is not in the list above.<<
--
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| Ayrx |__\_ Eric S. Emerson
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