You can now install a whopping 16 GB of RAM in your iMac! In a very welcome move, Apple doubled the number of slots, enabling you to install four 4 GB PC3-8500 chips.
Naturally, we just had to see for ourselves. Apple's not kidding, if you have the cash, you really can have 16 GB of RAM in your iMac! 16 GB will set you back $1,400 from Apple, or $400 from us.