I asked a question in another topic, but the holivar started there :) so I deleted there, and here I repeat:
Dear, I had this situation.
Note: Asus A8Js Core2Duo T5600 1.83Ghz, 2 * 1Gb RAM (533Mhz), Nvidia GeForce Go 7700 (512Mb).
I put 7-x86, I liked everything, according to subjective feelings - at least no slower than XP.
But read the article:Windows 7 (32-bit / 64-bit): 2GB vs. 4GB RAM in games
and sort of realized that you can put 4 Gb (although the article seems to be a big increase in games).
But on the basis of popular wisdom "memory is not enough," put to test 2 * 2 Gb Samsung 800Mhz,
When loading the BIOS, it showed only 3Gb, in the system itself it was written that 4G was installed, but only 3G was used. Everest showed the same as sitema. Everest showed that PAE is on.
Interestingly, 4G worked all the same or not, if not, why did the people in 7K 4G work on that 32-bit system in that article?
Somewhere I read that 7-ka shows that it uses 3Gb, but actually uses 4gig.
PS: in the end, while remaining on the Transcend 1Gb RAM (533Mhz) and Samsung 2Gb RAM (800Mhz), the system determines the 3Gigas installed and in operation.