DDR2 4Gb modules in G5 Dual 2.0 Late 2005 - who knows?

[Riff_Al]

Hi guys!
I have Powermac G5 Dual 2.0 Late 2005 (PCIe, DDR2).
This PPC can work up to 16GB ECC or non-ECC DDR2 RAM.
But i want to know, is it can work with 4Gb modules or there is a limit for 2Gb in one ram module?
Cannot find information about that, may be somebody tried to install 4Gb modules in PPC.

 

[LightBulbFun]

according to the "U4" IBM CPC945 Memory controller datasheet, it can work with up to 64GB of RAM (with a 2GB hole right at the end)

however from what iv read 4GB RAM sticks while will work PCIe G5 for 32GB but only 16GB is seen by OS X

iv also read of a way around that, but considering who it was from, im taking it with a very large pinch of salt until im able to verify it myself

I do have some 4GB DDR2 UDIMM RAM sticks, however sadly they are a type of Samsung stick that none of my PowerPC macs seem to like (I have ones in smaller size ones in SODIMM form factor that my DLSD complains about in the same way)

(BTW do you mean Gb (Gigabit) or GB (Gigabyte) ? )

 

[Riff_Al]

BTW do you mean Gb (Gigabit) or GB (Gigabyte)

GigaBYTE of course ))
Also find 2GB IBM modules too, but now I began to doubt if your PPC do not like Samsung sticks, what about IBM ones made by Samsung?
P.S. sorry for my English, it is not my native language ))
[doublepost=1552140261][/doublepost]IBM sticks

 

[LightBulbFun]

those look like either registered or parity RAM sticks which wont work in a PCIe G5 regardless of size

you need DDR2 UDIMM, un-registered RAM sticks for a PCIe G5

 

[Riff_Al]

those look like either registered or parity RAM sticks which wont work in a PCIe G5 regardless of size

you need DDR2 UDIMM, un-registered RAM sticks for a PCIe G5

Yes, they are ECC sticks. But G5 Late 2005 can use ECC.
The link: https://discussions.apple.com/thread/4809859

"Hello, only the 2005 Dual Core/PCIe G5s can use ECC...
1. Use of ECC Memory in 2005 G5 Optional.
Apple standard included non-ECC memory in 2005 Apple Power Macintosh G5 Models and offered ECC memory as an option. In order to use ECC Memory in Power Mac G5 - all installed memory must be of the ECC Non-Registered type."
[doublepost=1552144225][/doublepost]Sticks must be only ECC or non-ECC, not mixed.
https://discussions.apple.com/thread/2798376

 

[LightBulbFun]

I never mentioned ECC or non ECC

you can run ECC RAM sticks in a PCIe G5 no problem, they just have to be un-registered ECC Sticks

sadly most ECC RAM sticks out there are registered

 

[Riff_Al]

I never mentioned ECC or non ECC

you can run ECC RAM sticks in a PCIe G5 no problem, they just have to be un-registered ECC Sticks

sadly most ECC RAM sticks out there are registered

Yes, you're right )
I haven't read your post carefully, it seemed to me that you wrote about ECC. Of course, ECC can be registered and not registered, those are registered )

 

[MisterKeeks]

iv also read of a way around that, but considering who it was from, im taking it with a very large pinch of salt until im able to verify it myself

Very curious as to what the workaround would be?

 

[LightBulbFun]

you can read about it here, however the user is very infamous for spreading misinformation about various things hence why I say take it with a pinch of salt

http://forum.netkas.org/index.php/topic,8415.0.html


but It is worth mentioning that officially the CPC945 Memory controller CAN address 64GB of RAM, this is said in IBMs official PDFs for the chipset

https://datasheet.datasheetarchive.com/originals/library/Datasheets-SW3/DSASW0048026.pdf

http://datasheet.datasheetarchive.com/originals/library/Datasheets-SW3/DSASW0048084.pdf

 

[MisterKeeks]

you can read about it here, however the user is very infamous for spreading misinformation about various things hence why I say take it with a pinch of salt

http://forum.netkas.org/index.php/topic,8415.0.html


but It is worth mentioning that officially the CPC945 Memory controller CAN address 64GB of RAM, this is said in IBMs official PDFs for the chipset

https://datasheet.datasheetarchive.com/originals/library/Datasheets-SW3/DSASW0048026.pdf

http://datasheet.datasheetarchive.com/originals/library/Datasheets-SW3/DSASW0048084.pdf

Ah yes, rabidz7...


Edit: the guy posted the same text to reddit on the same day, but instead of saying he had 8x8GB and it worked, he said he had 8x2GB but it should work...
https://www.reddit.com/r/mac/comments/206twk/g5_quad_overclocking_and_allowing_64gb_of_ram/