On Dec 12, 2009, at 3:37 AM, Mac User #330250 wrote:
> -- Original message --
> Subject: fw800 dual 1.42 Processor card in a non- fw800 MDD?
> Date:Samstag 12 Dezember 2009N
> From:Jeffrey Engle
> To: g3-5-list@googlegroups.com
>
>> Can I install a dual 1.42 Processor card that came out of a MDD FW800
>> onto a non-FW800 logic board? inside a non-FW800 MDD Powermac? Jeff
>>
>
> Yes, you just have to match the system bus speed.
>
> See also:
> http://discussions.apple.com/thread.jspa?threadID=2064676
>
> I had a Dual-1.0 GHz MDD (original, non-FireWire-800), which has a
> 167 MHz
> system bus and now it's running a Dual-1.42 GHz (out of a FW800)
> without any
> problems -- and without the need of modifications aside from the
> processor
> card swap.
>
> The only importaint thing is to use the correct heat sink, because
> the one
> from the Dual-1.0 GHz doesn't have the capacity to offload enough
> heat, so you
> definitely need the one from the Dual-1.42 GHz out of the FW800 it
> came with.
>
> Cheers,
> Andreas
>
I did the exact same thing. I managed to score a dual 1.42 GHz card
and heat sink for what was a single 1.25 GHz machine. All I did was
swap out the old, and install the "new". Worked without issues the
very first time. Although, even with the correct heatsink, the fans do
run louder, but I've gotten used to it, so it doesn't bother much
anymore. And I don't know if the dual card came from a FW800 or FW400
box. I was just glad I had the 167 MHz bus speed so I didn't have to
mess with that.
And while I had the machine open, I cleaned it out, carefully, and
swapped one of the installed 120 GB HDD's for a 250GB drive and
(finally) upgraded to Leopard. I debated the worth of doing any
upgrading on a four year old {{C machine, but it has served me well,
and my current uses don't demand an Intel box, yet.
Mark
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