under 10.4.1 (native) I had a xBench score of 46.76. After formatting and installing 10.4.3 (native) my xBench score jumped to 76.68 using the JaS 4.2b patch (Note: my OC settings changed by 3mhz additional on the fsb). I have 10.4.4 but have not installed just yet. I was wondering if those who have upgraded further to 10.4.4/.5 have had an increase/decrease in performance. Also if you have varied performance using different patches for the same version of OSX please note that in any reply you may post.