Originally Posted by
Drools
Of course mechanical issues aside, one of the Mach3 optimization steps say to make sure the OS install is set to "Standard PC" instead of "ACPI Multiprocessor PC". This is a huge change in the way the PC functions, it is a change at the HAL layer. This will directly relate to hardware communication. I'm still in test mode and on the fence as to how much the change helped but if Mach3 says to do it this way then it has to be for a reason.
BTW: it is not easy to change the computer type after the OS is installed. I did a complete reinstall just to be sure.