Long story short in a few points: I have a mid 2011 iMac (the one in my signature) with 32 GB of RAM that I bought at Crucial Those 32 GB are PC3-10600 I'd like to buy a new iMac, the new 3,5 Ghz, also 27" and i7 I asked Crucial if my current RAM will work in the new Mac They said no, because my current 32 GB are PC3-10600 and I'd need PC3-12800 for the new one Just wondering if that's true? Obviously they want to sell as much as possible. I hope they didn't lie to me, I'd never buy from them again. I don't know what these PC3 things are, but from what I got, it's just the speed of the memory. So my old (current) RAM would just be a bit slower, no? I mean to me it sounds like the iMac allows faster RAM, but that doesn't mean you need it. Thanks!