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Yeah, I know that you need identical sticks for dual channel. CPU-Z seems to keep reporting my 1.5 GB of RAM as being in Dual and not single. I do the same thing on my other PC's here and it reverts to single channel.

That depends on the chipset and i know for a fact that AMD overcame that limitation ages ago and i'd say intel did too.

EDIT: Straight from the horses mouth! Dual channel is enabled with intels flex memory technology!

Intel Flex Memory Technology said:
Facilitates easier upgrades by allowing different memory sizes to be populated and remain in dual-channel mode.
 
You don't need identical sticks, just two. Then again that could be only with AMD processors.

That depends on the chipset and i know for a fact that AMD overcame that limitation ages ago and i'd say intel did too.

EDIT: Well it seems intel didn't actually fix that.
Two posts quoting me? :D

It's on Intel systems. I don't have any AMD ones. They're different sizes as well. CPU-Z still says Dual Channel mode.
 
Two posts quoting me? :D

It's on Intel systems. I don't have any AMD ones. They're different sizes as well. CPU-Z still says Dual Channel mode.

You should feel honoured. Anyway according to intel themselves the macbook pro comes with a flex memory enabled controller and flex memory enables dual channel mode with different size memory sticks!
 
Have any facts to back that up? cos so far what you're saying is just another word of mouth so why should i take your word over the other?
What is it with people that they continue to deny facts just because they don't know something? Questions are asked, then they are answered. If you don't trust answers, then......geez, I don't know what....sit at home not knowing for sure.

Fact: Apple recommends paired ram in the Mini/MB/Edu iMac, but not in the iMac/MBP.

As discussed further in this thread, the Mac Pro requires paired ram for its Dual-channel setup. None of the other Intel Macs need this. However, they can have limited improvements with paired ram for memory interleaving. But it only matters in real-world measurements on the models with integrated graphics. So, MP: pair the ram; MBP/iMac: who cares; MB/Mini/Edu: pair it if you are anal.

If you don't believe this, fine. I give up. Buy one of each model of the computers and the ram and do extensive testing yourself.
 
You should feel honoured. Anyway according to intel themselves the macbook pro comes with a flex memory enabled controller and flex memory enables dual channel mode with different size memory sticks!
I guess my iMac should fall under that with the same 945 chip set right?
 
You should feel honoured. Anyway according to intel themselves the macbook pro comes with a flex memory enabled controller and flex memory enables dual channel mode with different size memory sticks!

Finally, a straight answer! :D
 
i would think 3GB would outperform any additional benefits from a 'dual channel' setup with 2GB.
 
3 gigs > 2 gigs matched pairs. But if you aren't really going to use more then 2 gigs and if you don't have the money for a 2 gig dimm..then I don't think its worth it.
 
3 gigs > 2 gigs matched pairs. But if you aren't really going to use more then 2 gigs and if you don't have the money for a 2 gig dimm..then I don't think its worth it.

As said (by intel themselves), you get dual channel with any two sticks of ram so why worry?
 
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