Currently Being ModeratedOct 29, 2012 7:15 AM (in response to JB-Baby)
I can only suspect the Kingston RAM and suggest that you should:
1. Recheck the iMac: Memory specifications to make sure that the Kingston RAM is correct for your model iMac.
3. Remove the Kingston RAM and run it for a few days on the stock RAM installed to see if the problem clears up.iMac, Mac Mini, iPad, iPods, Mac OS X (10.6.8), (10.8.2), Safari, iTunes, iPhoto
Currently Being ModeratedOct 29, 2012 12:18 PM (in response to den.thed)
Thanks for the suggestions.
I just ran the memtest and it found no problems. so i guess it must be something else.
Currently Being ModeratedOct 29, 2012 2:22 PM (in response to JB-Baby)
Never hurts to be certain.
The next time it locks up and you get it going again, open the Console in Applications / Utilities and check back in All Messages to see if it doesn't indicate what the problem was.