One thing about clocking...
I've got a Centris 610, which I put a full O40 into.  When I got my
centris, it had an oscillator kit which upped the clock speed from 20 Mhz
to about 33.  When overclocked, the onboard ethernet would not work.
Removing the chipper, restored normal ethernet operation.

I understand that the Quadra's have a separate clock for the IO, so upping
the processor speed won't have the same effect.  I forget where I found it,
but there is a web site on changing clock speeds, and it told how to add a
separate clock to the Centris'es so that changing the clock speed won't
break the IO.

Good Luck,
Roger

At 7:12 PM -0800 3/12/00, Erik Winkler wrote:
>True it is a 66 MHz processor, but all data input/output is at 33 MHz
>effectively making it a 33MHz 040.  It's just marketing hype, like the 1
>GHz Athalon. Installing it into the 650 shouldn't be a problem.  I popped a
>33 Mhz rated 68040 into a Quadra 605 and it ran fine.  Much more stable
>than the LC040.
>
>Erik
>
>Salvatore Mancini wrote:
>
>> Hello
>>
>> I have a centris 650 motherboard with an lc 040 that I would like to put
>> netbsd onto. I have a hurting quadra 950 also. I was wondering if there
>> is a problem with putting the full 040 from the 950 into the centris.
>> The 040 is listed in apple's database as being a 66mhz processor
>> whereasthe centris runs at 25mhz. Is there a danger in doing this? Has
>> anyone tried this or something similar?
>>
>> Sal Mancini