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EP45-UD3P Mountain Lion only work when "cpus=1" help needed!

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Joined
May 27, 2011
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Motherboard
MacBook Pro
CPU
i7
Graphics
Nvidia GT 330M
Mac
  1. MacBook Pro
Hi Forum,

I'm trying to install Mountain Lion on a Gigabyte EP45-UD3P with Intel Q9650 CPU. Video card is nVidia GT210. I was able to install it by Unitbeast, Multibeast (all latest). So far it's running, but only with "cpus=1". If I remove "cpus=1", system is not very stable, process hangs, but still killable and so on.

I use DSDT downloaded from forum (for EP45-UD3P of cause), The BIOS version is F11D. I remember that I need to use Voodoo tcsync of something on some system if I want to use multiple cores back to LION. Is this still true with mountain lion? I searched forum, many success story with this motherboard never mentioned this issue.

Help please.

Thanks

Noodle
 
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