Model A1181: 1.83, 2, 2.1, 2.13, 2.16, 2.2, or 2.4 GHz Core 2 Duo processor

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How do I know if I have a Santa Rosa model?

Well, just what the title says. I know I have an Early 2009 MacBook with a 2 GHz Intel Core 2 Duo which came with 2GB of RAM, but i have absolutely no idea whether I have a Santa Rosa/Penryn model or not. How do I know?

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By the information you have given you have a Penryn. You can go here to find out what MacBook is what.

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That's right, thanks! The serial number lookup page from mayer confirms that. Thanks guys!

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The easiest way is to go to the site CAB mentioned: http://www.everymac.com/ultimate-mac-loo...

then enter the last three figures of your serial number.

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The term "Penryn" refers to the processor/CPU chip, and the term "Santa Rosa" refers to the logic board chipset (several other chips besides the CPU). The Everymac website won't tell you what logic board chipset a Macbook contains, and it also doesn't use the references Penryn, Santa Rosa, etc. A better source for some of these terms is the utility "Mactracker", which can be downloaded from most Mac software websites. The processor in the Early 2009 Macbook is a Penryn (P7350), but the logic board chipset is not the Santa Rosa, which supports only an 800 MHz system bus--since the system bus in the Early 2009 Macbook is 1066 MHz, the logic board chipset is the Montevina.

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