what is your system OS ? Turbo mode enabled and the system is idling it may use minimum cores
Press Windows Key and R and Type Msconfig, Goto Boot.ini Tab and Then click advanced --- Set /NUMPROC= to the maximum , Ok and restart the system --- Open Task manager when back in windows
Note unchecking the selection seems to have done the trick here
http://www.tomshardware.co.uk/forum/311323-28-quad-core-shows-core
Voting 0