The reason why ONLY the 17'' MBP and the 15'' 2.66 support 8GB RAM

Hi, I think I know why Apple is able to offer 8gb ram support on the revised 2.66 MBP and not on the 2.53 or 2.4 MBP.
Take a look at this:
15'' 2.4-2,53 NVDA Chipset
http://s1.guide-images.ifixit.com/igi/oEmmaxSOKDDvZfZh.large
17'' NVDA Chipset
http://s1.guide-images.ifixit.com/igi/SSLSgODWYbiIuTLL.large
There are TWO different revisions. The first is B2 and the latter is B3.
I think that the former does not support 8GB of RAM and the latter does. That explains why the 17'' has support and now the NEWs 15'' also have, Apple gave the 15'' not only a speed bump but also the newer revision of the chipset!
Message was edited by: sjds

It is no longer possible to navigate to the 8GB page, but the direct link is still working:
http://store.apple.com/us/memorymodel/ME15_2_66MBP
I called the Apple Store (1-800...) and was told that the max is still 4GB. Then I read the direct URL out to the sales rep and he was surprised to see the page. He put me on hold and when he returned he said he'd spoken to a sales engineer who said that it was untested and unsupported, but that this did not mean it would not work.
I'm not actually interested in buying 8GB of RAM right now, but I would like to have some confidence that if I buy a MBP now, that I will be able to upgrade later when memory prices come down.
My guess is that Mac OS X 10.5.7 will be released soon and at that point the specs will be updated to max 8GB supported.
Fingers crossed!

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