Max memory that that white C2D iMac supports?

[Buzz]

OK, so you can match SODIMM's for better performance, or max memory at 3GB for mo' better performance, even though the SODIMM's no longer match. Rumors are that the white C2D iMacs can handle up to 3.3ish GB's if you stuff 4GB of actual RAM in 'em..., but the Q is, how do you tell? I put 4GB in, which shows as 4GB in System Profiler w/ 2GB in each slot, and as 4GB in About This Mac, but in Activity Monitor it shows as 3.0GB of memory... how does the 3.3ish GB's come into play? Is it theoretical, and artificially limited in the system somehow by h/w or s/w? Is the 3GB in Activity monitor now 2+1, or 1.5+1.5, and do the SODIMM's match to help performance? Is there some other utility that will show it as 3.3ish? The iMac is babysitting future MBP memory for the time being. Thanks,

Buzz
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[Harbourmaster]

OWC website has info on this....somewhere...

[BigGuynRusty]

MacTracker

BGnR

[OWC Larry]

http://eshop.macsales.com/shop/apple/mem...Benchmarks

will show you performance testing with up to 4.0GB installed.

3.0GB is the max officially supported... but installing 4GB with a pair vs 3gb non-paired gets you 128MBit addressing (vs 64 bit if you don't have a pair) that seems to give some minor benefit.

For my money - 3.0GB is the way to go.... but that's with testing under Tiger. Leopard might change the game and increase the 128MBit addressing benefit... or maybe it won't. Can always go to 3GB not and 4GB later... unless you have the low end model, it should have come with either 1 x 1GB with one slot open or 2 x 1GB, replace a 1GB with a 2GB to go to 3.0GB.