Chosen Solution
Can the 2 GB / PC2-6400 800MHz chips be replaced by a higher memory chip?
Yes, it can be done. I own an i-mac intel 20" 2210, and I have managed to increase the RAM to 8 GB using two 4GB modules manufactured by Patriot (Patriot Signature Series) part# psd24g8002s. I am not sure if other modules by other manufacturers would work the same.
According to OWC, the 2133 (mid-late 2007) will accept 6 Gb; 4 in the right bank and 2 in the left. I have installed this and it is recognized by the machine when selecting “about this mac”.
It will actually only will accept only 6 g. I tried 8g and it recognized it But the computer slow down significantly.
