[Grip]

I just recently upgraded the RAM in an old G4 iMac (17" gooseneck, 1Ghz processor, OSX 10.5.6). I pulled out an old 256MB PC2100 stick and replaced it with a 1G PC2700 stick (Kingston).

It started up fine and ran well for about a day and then I got a flurry of KPs -- usually at startup.

My question is whether I used the wrong kind of RAM, I got bad RAM, or could it be something else?

I had this computer in may garage for a few years and when I opened it up I cleaned it out pretty well so I don't think it is heat (plus the fan isn't spinning too fast).

I should also note that after I installed the RAM, System Profiler said I had 1.25G of RAM even though I had a 512MB ram in the SO-DIMM slot. I assume that is just because there is a limit of 1.25 on this particular model?

Thanks for taking the time to read. Any help is appreciated!

[PB PM]

Sounds like bad RAM.

[alcimedes]

Wrong RAM usually just won't work. Agree that it sounds like bad RAM. Remove it, see if the KP's go away.

[Grip]

Thanks for the replies.

Removed the RAM and replaced it with a different stick -- no luck

Removed RAM and replaced it with original Apple installed RAM and no luck -- still getting a kernel panic from time to time.

Downgraded to to Tiger and seems to have quelled the KPs somewhat but still get them (but way less frequently).

I also ran Disk Utility and Disk Warrior and not issues presented.

Any other things I should try?

[PB PM]

Try running Apple hardware test, it should be on your machines original install disks.

[Grip]

Update:

Couldn't find the original install disks.

I replaced the HD for the heck of it. Didn't work.

Then I pulled out the factory installed SO-DIMM (for some lame reason the last thing I suspected) and ... no more KPs!

Thanks everyone!