Max RAM supported by Power Mac G4 MDD

Panzerfaust101

macrumors newbie
Original poster
Dec 17, 2011
21
0
Just a small question about the limits for a MDD G4. I've heard some sources say that the max is 2GB (with, presumably, 4x 512MB RAM sticks), however I've come across 1GB RAM sticks which are the same as DDR333 sticks (which come as standard and are supported by the logicboard/motherboard). Would the Mac be able to recognise these sticks? If they do, would it mean that I can have a max of 4GB instead of 2? If they aren't recognised, can someone point me in the direction of sticks which are recognised by MDDs? Thanks :D
 

adcx64

macrumors 65816
Nov 17, 2008
1,227
42
Philadelphia
System Profiler might see the RAM but the computer would not be able to utilize it. This is how it is on some PCs and other Macs.
 

Panzerfaust101

macrumors newbie
Original poster
Dec 17, 2011
21
0
The G4 displays the amount of RAM in the Activity Monitor as 2GB so does that mean that it is in fact recognised?
 

reddrag0n

macrumors 6502
Oct 1, 2007
332
27
Canada
You can use ram for the MDD in this configuration...

4 - 512 MB PC 2700 or PC 3200
----- or -----
2 - 512 MB PC 2700 or PC 3200
1 - 1 GB PC 2700 or PC 3200
----- or -----
2 - 1 GB PC 2700 or PC 3200

The max you will use in your MDD is 2 GB of ram. PC 3200 will clock back to PC 2700 speeds.
Aquamac from aquamac forums was able to find this out when he was modding his MDD's.
 

seveej

macrumors 6502a
Dec 14, 2009
822
50
Helsinki, Finland
You can use ram for the MDD in this configuration...

4 - 512 MB PC 2700 or PC 3200
----- or -----
2 - 512 MB PC 2700 or PC 3200
1 - 1 GB PC 2700 or PC 3200
----- or -----
2 - 1 GB PC 2700 or PC 3200

The max you will use in your MDD is 2 GB of ram. PC 3200 will clock back to PC 2700 speeds.
Aquamac from aquamac forums was able to find this out when he was modding his MDD's.
Before anyone notifies me, that I'm posting on an old thread: I know, but I feel that this information is important to be "out there", because there are many discussions and posts out there saying that 1GB sticks in an MDD is a no-go.

I can affirm, that 1 GB sticks DO work in an MDD, BUT that 512 MB sticks are recommended, as the 1GB sticks have to be placed in specific slots to work. In the case of my MDD, the only two suitable slots were DIMM/J21 and DIMM/J22.

Please also keep in mind, that not all memory PC3200 sticks readily support "downclocking" to PC2700, so unless you can get a good return policy, go for PC2700.

RGDS,
Pekka
 

supernova777

macrumors member
Dec 22, 2007
74
9
i have recently bought a mdd dual 867 machine for 30 dollars.
activity monitor is reporting 2gb ram
inside i have the following configuration:
1x 1gb module
1 x 512mb module
2 x 256mb module

i used a 1gb ddr pc3200 module and it seems to work.
 
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