Linux n00b ahoy! In Windows it sometimes displays the CPU speed wrong as you've changed the multiplier but its just calculating the CPU speed based on the stock multiplier from the CPUID x current FSB (or if you've changed both the multiplier and the FSB it'll show a clock speed that's neither the real one or the stock one!). If you use CPU-Z it gets the actual clock speed as it polls for the current multiplier as-well as the current FSB. The two Linux commands I know of are /proc/cpuinfo and lscpu. If the CPU is running overclocked or underclocked, will /proc/cpuinfo and lscpu be reading out the actual current clock speed? Or will they be reading out the stock clock speed based on the CPUID? I want to read out the actual current clock speed whether it's stock/underclocked/overclocked (so SpeedStep/Cool 'n' quiet features might have turned it down etc).