C3 Time is the percentage of time the processor spends in the C3 low-power idle state. % C3 Time is a subset of the total ...

% C3 Time is the percentage of time the processor spends in the C3 low-power idle state. % C3 Time is a subset of the total processor idle time. When the processor is in the C3 low-power idle state it is unable to maintain the coherency of its caches. The C3 power state is a lower power and higher exit latency state than C2. Not all systems support the C3 state.