what's the best way to tell what kind of processor is in it? On Sun, Oct 4, 2009 at 5:00 PM, Jim Scott <jesco...@gmail.com> wrote: > > > On Oct 4, 2009, at 1:39 PM, Christian Wacker wrote: > >> >> My school is throwing out a bunch of old G3 iMacs with bad PSU\CRT >> issues (logic boards are still good) >> I have a 350mhz G3 Blueberry >> Most of the systems are iMac DV systems >> Could I put one of the DV boards in my system? >> -Christian > > This has been covered many, many times on this list. The short answer > is that you can put any G3 350-450 MHz logic board into any other > original G3 350-450 iMac. All these have Motorola cpus. > You also may be able to swap a 500 MHz G3 iMac logic board into your > 350, IF it has a Motorola cpu. But there also were 500 MHz IBM cpu G3 > iMac logic boards. > > WARNING: G3 500 Mhz iMac logic boards with IBM cpus will fit, but the > cpu will not match up with the Motorola cpu's heat sink, which will > cause the cpu to self-destruct very quickly. The same holds true for > 600 & 700 MHz IBM G3 iMac logic boards. > > So, you can swap any Motorola logic board with any other original > Motorola G3 iMac, and you can swap any IBM logic board with any other > IBM G3 iMac, but you can't swap an IBM into a Motorola or vice versa. > > CAUTION: However, what you can do is swap logic boards and the > matching perforated divider boards with appropriately positioned heat > sinks into any G3 350-700 iMac. Of course, you have to completely > disassemble the iMac to do this. And in the process, you have to > disconnect the high-power lead from the flyback transformer to the > CRT. This means you have to discharge the CRT using proper tools and > safety technique. If an iMac hasn't been plugged in for a long time, > there's not much chance of getting zapped. However, if the iMac's been > plugged in recently for testing, there well may be some seriously > aggressive electrons waiting for you to complete a circuit to ground > with your body. > > -- Jim Scott > > > >
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