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pungohboy
Mar 21, 2011, 10:33 PM
Hello, its been a long time since I posted, I just picked up a Power Mac G5 (Late 2005) and it currently has 512mb ram :eek: The memory installed is non ECC it is PC2 4200u-444 of course 2 256 sticks.

I got my hands on 4 matching 1GB sticks of crucial PC2-4200R-444 ECC memory. Of course it dont work or I wouldnt be posting. I am getting 3 beeps followed by the fans blowing full blast. The code shows that no available RAM or something along those lines. According to Crucial the G5 does accept ECC memory I did not mix non-ECC and ECC so I am at a loss to what the problem is. The memory came from a working Dell server so I know its good. Is it just not compatible or am I missing something?

Any help is appreciated.



VanneDC
Mar 22, 2011, 08:18 AM
has to be normal non ecc mem. fitted from the middle outwards in matched sets. ddr400, unless its a dual core model. (do not confuse dual cpu and dual core)

cheers

666sheep
Mar 22, 2011, 08:48 AM
Vanne, OP has DC. ECC PC2 4200 should work OK (unless it's HD RAM ofc).

OP, post exact sticks description (or picture, or what is printed on single chip). If it's High Density (128x8) memory - it won't work.
It has to be Low Density (64x8).

pungohboy
Mar 22, 2011, 08:30 PM
Vanne, OP has DC. ECC PC2 4200 should work OK (unless it's HD RAM ofc).

OP, post exact sticks description (or picture, or what is printed on single chip). If it's High Density (128x8) memory - it won't work.
It has to be Low Density (64x8).


Crucial BG1121M.QG
CT12872AB53ES.18FB3
1GB 240-PIN 128Mx72 DDR2 PC2-4200R-444-12-c0


Thanks for the help.

VanneDC
Mar 22, 2011, 10:03 PM
thanks Sheepy, yeah i can never remeber when the DC models came out, i refer to them as DC or PCie PMg5's :)

Joshuarocks
Mar 23, 2011, 12:41 AM
thanks Sheepy, yeah i can never remeber when the DC models came out, i refer to them as DC or PCie PMg5's :)

October 2005 - sometime in mid 2006

Power Mac G5 Dual Core PCIe 2.0 air cooled
Power Mac G5 Dual Core PCIe 2.3 air cooled
Power Mac G5 Quad Core PCIe 2.5 liquid cooled.

666sheep
Mar 23, 2011, 05:28 AM
Crucial BG1121M.QG
CT12872AB53ES.18FB3
1GB 240-PIN 128Mx72 DDR2 PC2-4200R-444-12-c0


Thanks for the help.

OK, the problem is, that it's Registered (buffered) memory.
Late 2005 can use ECC RAM but it has to be non-registered.

Like this one (http://cgi.ebay.com/1GB-DDR2-ECC-Non-Registered-PC4200-533MHz-RAM-Upgrade-/170611637716?pt=AU_Server_Accessories_Parts&hash=item27b93efdd4)

Stick you've bought have a small rectangle shaped chip near center notch (between square chips), correct?

Above link shows how compatible ECC sticks should look like.

pungohboy
Mar 23, 2011, 06:40 AM
OK, the problem is, that it's Registered (buffered) memory.
Late 2005 can use ECC RAM but it has to be non-registered.

Like this one (http://cgi.ebay.com/1GB-DDR2-ECC-Non-Registered-PC4200-533MHz-RAM-Upgrade-/170611637716?pt=AU_Server_Accessories_Parts&hash=item27b93efdd4)

Stick you've bought have a small rectangle shaped chip near center notch (between square chips), correct?

Above link shows how compatible ECC sticks should look like.

Alright that would be it. I kept seeing that it could use ECC but didnt see anything about it having to be non-registered. At least it didnt cost me anything. I just wanted to make sure if I buy some that it was going to work. Thanks again.