How to boost XP speed by by changing real time clock priority?

I read about this trick the other day over Internet. Open Registry by going

to START-RUN and typing REGEDIT. Navigate to

[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\PriorityControl]. If

you see an entry by the name IRQ8Priority set it to a value

"IRQ8Priority"=dword:00000001 if you don't then click on the right pane and

add a new dword entry with given name.. IRQ8 is typically reserved for real

time clock in most of the computers. Make sure thats the case (by going to

device manager -> system devices -> system COMS/realtime clock ->

properties -> resources tab , if it is set to another number try adding an

entry with that number N as IRQNPriority) . Generally realtime clock

priority boosting helps most but you are free to try others as well.