View Full Version : iMac G5 ALS - Memory Upgrade Q

Aug 28, 2009, 03:55 PM
Have 2 x512M modules installed

Size: 512 MB
Speed: PC3200U-30330

And was thinking about going to 2 x 1G.

I see it's DDR but when i look around - DDR2 is less than half the price of DDR

So although i know it's unlikely - wanted to check if there was any compatibility between the G5 ALS and DDR2 memory?
This from crucial uk would suggest not

Generally speaking, motherboards are built to support only one type of memory. You cannot mix and match SDRAM, DDR, DDR2, or DDR3 memory on the same motherboard in any system. They will not function and will not even fit in the same sockets.

Found on ebay some suggestions that 'high density' memory doesn't work in Macs - sounds like i need to be careful what i get - any suggestions here?

Aug 28, 2009, 06:45 PM
Yup. DDR is still pretty expensive. Only the last gen iMac G5 used DDR2 so it won't fit your model G5. Just remember to install in matching pairs.

Look for places like newegg.com or Frys.com as they usually have deals on DDR memory with mail-in-rebates.

Aug 29, 2009, 09:32 AM
any thoughts on 'high density' memory and whether i need to consider this?

Aug 29, 2009, 10:21 AM
I know that the G4 Macs were picky with high density memory. I don't think I heard anything about the G5 platform being as picky but maybe someone else would know?