Powermac RAM

[macbaseball]

I understand that Powermac RAM has to be added to pairs of two, but do they have to all be the same size. My instinct would say no, but I just want to make sure. I searched, but there are way too many threads.

[Blue Velvet]

Matching pairs (same size) installed in two banks outwards from the centre.

Edit: Like this.

00BA-AB00

Double edit: To clarify, yes different sizes but still in matching pairs

[benwa02]

installed in pairs but you can have different sizes

example-2x512 and 2x256

atleast thats what i believe

[freiheit]

This is correct for the G5 PowerMacs. Memory must be installed in identical pairs (size and speed, preferrably from the same manufacturer, too) but you can add additional pairs that differ from the first pair (eg. 2x256MB + 2x512MB + 2x128MB if you want).

On the G4 PowerMacs memory can be installed in any combination (no pairing needed).

[macbaseball]

Alright, thanks for all the info. I understand how it works now.