iMac 11,3 memory upgrade - 10600 or 8500?
I have a 27" 11,3 iMac with 4GB of RAM. I'd like to upgrade to at least 8GB. When I look on Apple's site, it states that the memory is PC3-10600 for my model. When I search a number of websites for modules, it comes up PC3-8500. Going into "About my Mac", I can't seem to find this specification for my existing modules.
1) Do I need 10600 or 8500?
2) I figure I can fill my bottom tow slots with 2GB modules giving me 8GB of RAM, but can I fill them with 4GB modules, which would give me 12GB?
Thanks!