Restart required to recognize RAM?

Hi guys: I have a G5 PowerMac 1.8 GHz Dual processor running OS 10.4.10. Back in January, I installed two 1 GB RAM chips from Crucial in slots DIMM2/J13 and DIMM3/J14 (two 512 chips are in the first two slots). Everything was fine, the memory was recognized and I had no problems. Then recently I updated to OS 10.4.10, and I noticed that upon start-up the two 1 GB RAM sticks were not recognized -- the system profiler showed the slots as empty. If I reboot the machine, the RAM then shows up. This "workaround" (just restarting every morning) is a functional fix but clearly something is not right. The guys at Crucial said something vague about an OS bug that might be causing the problem. Any ideas or suggestions from all you smart people in the forum? I have tried zapping the PRAM but the problem persists. Thanks in advance for your help.

Hi James Koh1-
Have you tried swapping the positions of the 512 pair and 1 GB pair?
I personally never heard of an OS "bug" causing this. What does happen is that the Mac OS seems to get pickier about RAM with each system update. If the RAM is under warranty I would suggest returning it and trying another pair or 1GB sticks.
Luck-
-DaddyPaycheck

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