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Quad Core CPU - 3 Cores do nothing


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I successfully installed Snow Leopard on my machine by using Empire EFI and a SL Retail DVD.


Everything was fine, I even didn't need any special arguments while installing. After installation, I could easily upgrade to 10.6.7, so far so good. I didn't install anything else yet except NVEnabler for my graphics.


The problem is, in the Activity Monitor, I see 4 Graphs for all 4 Cores of my Core 2 Quad Q6600 processor, but 3 of them are black and the performance of the machine is bad. I assume that 3 cores are completely idling, they seem to do nothing.


The "About this Mac" box lists my processor as 1 CPU - 4 Core Intel Xeon @ 2,73Ghz. The clock is correct, but it's not a Xeon, only a Core 2 Quad.


My machine is a Asus P5Q Motherboard, 4GB of DDR2 RAM, A Geforce 9800 GT graphics and the CPU mentioned above.


Is this a common problem? Any advice?


Thank you very much.



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Apple don't ship any Macs with Core 2 Quad CPUs.

Your bootloader automatically convinces OS X that you have the Xeon equivalent. This is good for compatibility.


Enable ACPI 2.0 and ACPI APIC in the BIOS. Enable all advanced CPU features except CPUID Limit.


Use a MacPro3,1 smbios.plist in /Extra (find one via the Forum search)


Upgrade to Chameleon 2.0 RC5.


Read about the new features here:


But try to find a newer version. I've compiled and posted a few lately, look in my previous posts. There's an install guide as well.

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