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Old May 21, 2008, 02:58 PM   #1
MSD401
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Powermac G4 ram issue

Alright so I am attempting to set up an older powermac G4 (single 667mhz) tower for basic office use nothing heavy, its currently running 10.3.9 but I plan on upgrading to either tiger or leapord (unsupported but I have some experience with it) ...I recently bought some ram though a forum member here and he stated it was tested and working (I am very inclided to believe him)... but I am running into an issue in that it will not reconize the 512 stick... (thread that I bought it from.... http://forums.macrumors.com/showthread.php?t=479214
amazon link to exact ram http://www.amazon.com/Kingston-KTA-G...38TQD8TDPMWNPR )

so my question is... is this broken ram or something else... currently it is only reconigizing one of the 256 sticks that I bought and two 128 that I had.... could it be firmware or and update or just the wrong ram....please help ....
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Old May 21, 2008, 03:25 PM   #2
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Quote:
Originally Posted by MSD401 View Post
Alright so I am attempting to set up an older powermac G4 (single 667mhz) tower for basic office use nothing heavy, its currently running 10.3.9 but I plan on upgrading to either tiger or leapord (unsupported but I have some experience with it) ...I recently bought some ram though a forum member here and he stated it was tested and working (I am very inclided to believe him)... but I am running into an issue in that it will not reconize the 512 stick... (thread that I bought it from.... http://forums.macrumors.com/showthread.php?t=479214
amazon link to exact ram http://www.amazon.com/Kingston-KTA-G...38TQD8TDPMWNPR )

so my question is... is this broken ram or something else... currently it is only reconigizing one of the 256 sticks that I bought and two 128 that I had.... could it be firmware or and update or just the wrong ram....please help ....
A) You need PC-133 SDRAM for a 667mhz G4.....it has a 133mhz FSB.

B) That ram you linked to on Amazon is PC-100 and is NOT the same ram that was shown in the marketplace thread you bought it from........

Look closely, the amazon ram has 9 chips on the front of the module, the one in the FS thread only has 8.......which would be the correct config, IF it was PC-133. The extra chip may be because it is ECC ram, intended for servers ??

C) PC-133 is backwards compatible and usually will work just fine in a 100mhz FSB machine by simply downclocking itself to run @100 mhz, HOWEVER......PC-100 ram will NOT & can NOT UPclock itself to run @133mhz........
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