yeah you are loosing some critical features of your motherboard by "disabling" those two...
for whatever reason, a lot of mobo manufactures ship with out of spec or they are just buggy all to hell...a bios update might fix it, or changing the settings in bios, you will have to look around google to see if either fix it...or do as error10 suggest call up evga and demand to know why they made a motherboard that only windows can use!
ACPI = Advanced Configuration and Power Interface
APIC = Advanced Programmable Interrupt Controllers
ACPI is the system that controls your dynamic speed fans, the power button behavior, sleep states, ect.
APIC is the replacement for the old PIC chip that used to come imbedded on motherboards that allowed you to setup interrupts for your soundcard, ide controllers, ect.