I'm helping someone with a memory upgrade for their 20-inch Core 2 Duo 2.66 GHz iMac (early 2008), which is all the information I can get about the computer from Apple's serial number checker. When I try to select memory at memory4less.com, it shows two different models with these specs, with different motherboards: MB324LL/A and MB391LL/A. How do I tell which this computer is, without cracking it open?

  • Do the details on EveryMac help? everymac.com/systems/apple/imac/specs/… – Graham Miln Jun 28 '15 at 15:51
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    I'd try the checker at crucial.com whether you end up buying from there or not, it takes the guesswork out of it – Tetsujin Jun 28 '15 at 16:00
  • @espertus It shouldn't make any difference for you upgrading the memory. – Rob Jun 28 '15 at 16:02
  • @Rob memory4less.com shows different memory, depending on the motherboard. – Ellen Spertus Jun 28 '15 at 16:55
  • Regarding Mac computers, they are called "Logic boards" – les Jun 29 '15 at 4:12

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