Thanks for input guys,
However, reading around the forums has led me to the point that adding another two 2gb chips would lead to a total of 6gb RAM but no quad channel mode. I thought this was of no significance compared to having more RAM overall. However, user GoKyu noticed that upgrading in this fashion increased his boot time from 30 secs to over a minute!
I dont want to be slowing my mac pro down by adding more memory!!
So im a little confused....maybe I should just get another two 1gb sticks.
However, despite the non quad mode issue GoKyu seems to have, two 2gb sticks seems a much better investment money wise.
😱
by the way, ive got a 2008 2.26 quad with 2gb ram, 512 8800gt and 320gb hard drive