🚀 go-pugleaf

Bernard Morey <bmorey@melbourne.DIALix.oz.au> wrote:

>On 11 Aug 1995, Richard Rigby wrote:

>> How do you overclock the CPU. I am a confessed speed freak with a TIGHT 
>> budget. So ho could U do it. I have a dx2/66 overdrive processor with a 
>> vesa board...I mot sure of the brand though and I have 60ms RAM. Please 
>> reply with some info

>You have to remove and replace the oscillator module on the motherboard.  
>It is a moderately fiddly soldering job.  I imagine a 66MHz machine uses 
>a 132Mhz oscmod, so to overclock you need somthing like a 160Mhz 
>oscmode.  I don't know if these are available after-market.  The highest 
>I have seen listed in 86MHz, which would be suitable for a 33MHZ machine.

The above gem of information is a beautie... and a first class way of
stuffing up an otherwise useable board.

DX2 chips fited to 33 MHz boards become... automaticly on boot... 66
MHz internal clock speed chips. DX4 CPUs are actually four times 25
MHz for those who cant add up and yes, you can over clock a DX4-100 to
130 Mhz by using a 33MHz. base but the chances of the chip being
reliable at that speed are not good.

The somewhat huge cooling fins fitted to DX4-100 CPUs makes fitting an
additional heatsink and fan virtually impossible.

Most "Multi Variable" mother boards - those that can take any makers
486 CPU can have jumpers set for 20, 25, 33 and 40 MHz. Some can even
be set for 50Mhz. as well as having a big block of jumpers to set the
board for different makes of chips.

Over clocking CPUs has a somewhat dubious history of unreliability.
Even without overclocking, AMD 486 CPUs only just kept their cool with
a heat sink and fan! Most needed an airconditioned office environment
to run reliably. Over clocking one of these chips is a disaster.

The bottom line here is that a little knowledge is a bloody dangerous
thing, add a little bit more knowledge on top of first little bit and
you can convert your perfectly good computer into a total disaster at
the touch of a soldering iron.

Regards from,

Doug Smith...........SMITEQ is a service company.