upgrading ram

i have a:

macbook pro 17"
intel core 2 duo processor
2.33 ghz

when bought laptop told upgradable 3 gigs of ram later did, saw friend , told me upgraded 6gb of ram possible? computer read whatever amount of ram install or limit?


again guys-

 

look here, either 3 gb ram or 6 gb ram (late 2007 models):

upgrading ram in macbooks , macbook pros​

 

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