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HowTo: Upgrade 486 motherboard to 486DX100 overdrive

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Fredrik Gatevold

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Mar 2, 1999, 3:00:00 AM3/2/99
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Hello

I have a 486 motherboard with a 486Dx33 prosessor, but I want to
change it with a 486DX100 overdrive, but I don't have the manual, and
I don't know which jumpers to change
Need your help !!!!

Thanks

Fredrik


joseph olah

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Mar 2, 1999, 3:00:00 AM3/2/99
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It's not likely you'll get any response until you provide the brand and
model of the motherboard you have. Even then it is unlikely someone
will be able to help with such an old system. There are probably three
sets of jumpers that need to be changed, CPU selectors, CPU clock
multiplier selector and CPUpower selector.

Jonathan Schattke

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Mar 3, 1999, 3:00:00 AM3/3/99
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Fredrik Gatevold wrote:
> I have a 486 motherboard with a 486Dx33 prosessor, but I want to
> change it with a 486DX100 overdrive, but I don't have the manual, and
> I don't know which jumpers to change
> Need your help !!!!

Lucky for you, the Intel Overdrive series is Drop-in. Just pull out the
DX33 & put in the DX4-100 OD! I did this myself just a couple of years
ago.

There are several after-market Overdrive chips that can offer even
faster performance, up to and including Pentium core/ 32 bit external
166 chips.

No need to trash that 33MHz IDE machine yet :)

--
\ /\ / If you aren't happy,
VVizVVom - Wandering Kernel of Happiness it's not my fault.
~~~> homepage at http://www.ripco.com/~wizwom <~~~

Alan Holtzman

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Mar 6, 1999, 3:00:00 AM3/6/99
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You can identify the mainboard by the FCC ID (it should be a sticker
somewhere on the board), or by the BIOS numbers which come up when the
machine is booting. This will at least tell you the manufacturor, so you
can visit their website and get the manual. windrivers.com has a link to
the FCC site, and sysopt.com has a listing of most BIOS codes. I've got
some 486 boards in good shape (133MHz AMD, PCI, ISA, and VESA, 4 72-pin
slots) (100 MHZ Cyrix and AMD, 4 30-pin and 2 72-pin slots, ISA/VESA) that
I'll let you have for $20 ($30 with VESA video and HDD controllers)!

joseph olah wrote:

> Fredrik Gatevold wrote:
> >
> > Hello


> >
> > I have a 486 motherboard with a 486Dx33 prosessor, but I want to
> > change it with a 486DX100 overdrive, but I don't have the manual, and
> > I don't know which jumpers to change
> > Need your help !!!!
> >

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