On Oct 10, 4:28 pm, "Mac User #330250" <[email protected]> wrote:

> > I've posted a picture of two 512MB modules here:
> >http://freenet-homepage.de/gee/test/twomodules.jpg
> > The top one is the new module in its case, the bottom one is a working
> > module I took from the G4 for the picture.
> > What have a missed? Thanks for any clue!
>
>
> Regarding density: I've never been able to distinguish high density modules
> from low density ones. How can I?

If the RAM stick has 16 chips, 8 on the front and 8 on the back, and
is non-ECC (non-sync) it is true low density and will (almost always)
work in the older Mac G3s and G4s. I can't tell from the pictures if
there are chips on the back. I have occasionally found that ECC (sync)
Ram might work in a G4 but it usually doesn't. The only way I know to
be absolutely certain RAM will work in your Mac is to buy used RAM
pulled from a Mac from the LEM swap list or buy it new from OWC.

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