According to Semthex FAQ, he says default fsb set to 200 which Celeron-D used to 133. So modify (add) the followings to /Library/Preferences/SystemConfiguration/com.apple.Boot.plist "-y" under "Kernel Flags" like sample as follows. Kernel …

For those who are interested in to trying new kernel (semthex and others') for PCs, I just leave what I did and successful on DELL GX520(620 will be the same) recently.Rig Spec: MoBo: DELL Optiplex GX520 CPU: Intel Celeron-D 2.xx GHz (I fo…