I'm purchasing a new imac i7 and considering the 8GB upgrade option from apple.. But I vaguely remember reading somewhere that 12GB / 3 sticks is faster than 2/4 sticks of ram... Am i right in this or completely dreaming?
I don't think iMac's use the triple channel compatible chips (as opposed to MacPro's), and for that reason apple does not even offer a 3 Dimm option.
So just get yourself 16gigs from www.Macsales.com and enjoy your computer!
Since you can get an iMac with the i3, i5 and the i7 processor that tells me that apple uses the socket 1156 chip. That would also mean that it uses the P55 chipset from Intel.
If you look at a list of motherboards here http://www.newegg.com/Product/Produc...GA1156)&Page=2
you'll find that none, except one, of the motherboards support tripple channel memory. This tells me that the iMac does not support the tripple channel memory.
If Apple decided to use the i7 with the socket 1366 in the iMac's than that would be a different story. Socket 1366 chips use the X58 chipset which most of the time uses tripple channel memory; socket 1366 chips also run little hotter and come only in the i7 variant. So that's another reason why I don't think that iMac supports tripple channel memory. So just go for 16 gigs of RAM
Wow thats really thorough thanks Andrew, now I can really buy it with confidence! I just purchased it today with 8GB because I'm on a budget, later on I will upgrade it to 16GB and trade in the original 8GB to macsales.com
According to Apple.com in order to get 8 gigs of RAM in your iMac you have 2 choices - for $200 you upgrade to 4 dimms, 2gigs each, or for $400 you get 2 dimms at 4gig each.
Now, if I was you I would get the iMac with 4gigs (2 chips, 2 gig each) and added 8gigs (2 dimms, 4gig each) from macsales for the price of $200. This way you end up having 12 gigs in your computer, and later for additional $200 you can upgrade to full 16gigs.
So, if I was you I would modify my order from apple!!! that is if it's not too late!