How much RAM can my 17" iMac take?

There's alot of conflicting views on this question. Does anybody know the answer? I have read that it can take 3G, others say it is made for 2G.
If I were to have 3G (currently I have 2G) would it actually make a big difference? Are there any empirical studies to support that it does significantly decrease processing time?
All replies are appreciated,
Thanks
Vincenso

It depends on exactly which model of 17" iMac you have, look closely at the difference in the spec's below:
Early 2006 Core Duo: http://support.apple.com/kb/SP35?locale=it_IT
Late 2006 Core 2 Duo: http://support.apple.com/kb/SP28
Note that:
All the 2006 Early Core Duo's and the Late 2006 1.83GHz models only support 2GB of ram.
Only the Late 2006 17" 2.0GHz Core 2 Duo model supports 3GB or ram.
Dennis

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http://www.apple.com/imac/specs.html
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8GB kit > http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=1D7DBABCA5CA7304
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How much RAM can I put into my Macbook Pro?

Here's my info:
Model Name:          MacBook Pro
Model Identifier:          MacBookPro4,1
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Processor Speed:          2.4 GHz
Number Of Processors:          1
Total Number Of Cores:          2
L2 Cache:          3 MB
Memory:          2 GB
Bus Speed:          800 MHz
I want to upgrade my RAM, as the computer is showing a bit of age at 3 years old now. I looked at this support page:
http://support.apple.com/kb/HT1270#link8
And judged the installation to be easy enough for me to do, but I'm confused as to how much RAM I can buy. The conflict I see is that "Additional notes" says I can use up to 8GB of RAM, but the table says only 4GB. What's throwing me off is basic math -- is that 4GB only referring to my slots (thus 4+4=8) or is it saying that anything over 4GB will not be recognized by my computer?
I spoke with someone at Apple, but he seemed a bit confused by my question, and eventually gave me a "yes" that was timid enough that I felt the need to post here. So, I'd appreciate the support! Thanks a lot, everyone. I'm just looking to not spend more than I need (in terms of buying excess RAM), and make sure I don't ruin my Mac in the process.

The MacBook Pro 4,1 can acces a maximum RAM of 6GB
However RAM comes in 4GB modules and you have two slots, so you install 8GB (two 4GB modules) and can only access 6GB of it according to MacTracker.
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http://www.crucial.com/
(no comp)

How much RAM can my 17" iMac take?

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