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Old 12-19-2008, 01:03 PM
thedecline thedecline is offline
Cheetah
 
Join Date: Jul 2008
Posts: 9
Frequent kernel panics with 8GB

Well here I am, and I need your help.

I've posted on Insanelymac.com a few times but it seems everybody is too busy posting about what parts they should buy for their new hack (I've done it too).

So here I am. I browse this forum every now and then and find it to be pretty good. I'm no noob to the scene, built about 6 hacks in my days. Now my magnum opus, the crown jewel of my collection, the opal of my eye is having trouble - and I can track it down to one thing: 8GB of Ram.

A little about the system - It's build on a pretty common p5Ke/Wifi board and an even more common Q6600 proc. I just upgraded to 8GB of 1066 Kingston Hyper X ram, which I am currently running at 5-5-5-18 and 2.2v overclocked (with this board you have to clock up 1066 ram - the ram IS spec'd at that though).

And the problem - constant kernel panics. They happen all day long, maybe three or four times in pretty random settings.

My attempts so far:
1. I have disabled JMicron and removed the jmicron.kext and the appleviaata.kext which are known to cause problems with more than 4GB of ram.
2. I have disabled and removed my add in silicon image 3132 pcie raid card and it's associated kext that is also known to cause problems with 4GB+ ram.

The above two steps seem to have reduced the kernel panics. For example when doing a multicore render in After Effects it would KP every time after about 25 seconds when using the siliconimage3132r5.kext. Without the kext, it will complete the render after about 10 minutes fine. Multitask fine, run memtest and pass fine, use up the full 8 gb of ram fine (if a little laggy?).

However it will KP whilst using Firefox, or KP whilst in Photoshop. The KP's (I'm using the abbreviation now...) are seemingly unrelated to anything I'm actually doing, where as before it would always KP when large amounts of ram were used in AE or memtest.

It was totally fine and stable as a rock when I was using the 4GB of 800 generic ram. To tell you the truth I wouldn't have spent the $200 on the ram if I knew this would happen.

Still there are folks out there who run 8GB of 1066 without any hitches, so that points me to a possible solution. Some things:

What boards are you 8GB 1066 folks running?
What timings are you running?
Any specific kexts you have removed?
Any stability problems?
Any other specific bios settings I should implement?
And please, any advice or help you can offer?

Thanks for reading guys and I'll really appreciate any help!
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