----------  Original message  ----------
Subject: Re: Power mac g3 (B&W) memory upgrade
Date:    Friday, 20. July 2012
From:    Valter Prahlad <[email protected]>
To:      [email protected]
> AFAIK, ECC memory won't work in your G3 (I think this is true for most
> PowerMacs).

Only the last G5 Dual-Core systems “Late 2005” can use DDR2-ECC memory (dual 
channel, i.e. in pairs).

All G4s and G3s are strictly non-ECC.

> Usually, PowerMacs are compatible with faster Ram sticks (I had a PC133 on
> my PC66 Beige G3), but this is not always true. Also, high-density chips
> can cause issues.
> You can easily find cheap PC133 Ram sticks from old, dismissed PCs.

Watch out for those high density modules! It is very often unclear and hard to 
identify if a memory module (“DIMM”) is low density or high density! This 
often posed a problem for me salvaging DIMMs from old PCs, which later turned 
out to be high density or PC100 instead of PC133 and so on.

For a G3 B&W you can always use PC100 or PC133 DIMMs, because PC133 is 100% 
backward compatible to PC100 (but not to PC66, used in Beige G3s).

Cheers,
Andreas  aka  Mac User #330250

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