So I just added 8 Gb of RAM to my MacPro 1,1 - which gives me 13 instead of the 5 I used to have. Someone had suggested I run Geekbench before and after - to see the difference in performance. Not sure exactly what Geekbench is measuring (thus, if it is even designed to detect what I presume to measure). In any event, with 5 Gb RAM, overall score is 5298. With 13 Gb RAM, overall score is 5369. I tried to attach a screen grab, don't know if that helps. New at this... Should my score have changed, or what might I use to evaluate objectively what kind of performance bump I should see?