Eric,
I popped an Evergreen 586 in my Gateway 4DX-33 about 2 years ago and it is
running fine! IIRC, the 586 can be used either in the overdrive socket or in
the original socket. The original speed is either tripled (100 MHz) or
quadrupled (133 MHz) internally.
You might want to make sure that your second socket was an overdrive socket,
and not a socket for a co-processor. If you put the Evergreen in the
co-processor socket, it might not work. Evergreen gives you a big sheet that
gives you instructions on where to install the 586, but they aren't very
clear. If you put it in the co-processor socket, you might have a bit of
trouble getting it out (unless it's a ZIF socket) as there is a printed
circuit board between the 586 CPU and the socket.
Roger Turk
Tucson, Arizona USA
Eric Emerson wrote:
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.<<
