[Dr_Hicks]

Originally Posted by bignose

That is the copy of Snow Leopard it came with (v10.6.3), My 9,1 came with 10.6 if that means anything.

Here is the ram I pulled out:
Hynix 1GB 2Rx8 PC2-5300S-555-12
Kingston KTA - MB800/1G

The Kingston is Apple certified, now all that means is it's running the correct times on the memory module.... I would remove the Hynix, run the machine to see is this solves the problem; run it for a few hours.

Now with the install DVD, that is great news you have the right copy.

**Before removing the Ram, you should follow this guide to run the Apple Hardware Test
http://support.apple.com/kb/HT1509 ***

Basically you have to hold down the "D" key while you press the power button, this will take you to the special diagnostic mode that will check the Ram, CPU, GPU and bus controllers.

I would run the hardware test first, see if you get some errors, if not that I would remove the Hynix ram and run the computer to see if that solves the problem.