I'm considering buying some additional RAM for my Mac Pro.
I currently have 4GB installed as 4 x 1GB modules. I understand that Mac Pro RAM needs to be installed in matched pairs.
Am I able to install another 4GB s 2 x 2GB modules in addition to the 4 x 1GB that are already installed?
The 2GB modules will be matched - but they do not match the other modules, does this cause a problem?