intel C2D L9400 turbo frekvenca????

Intel Dynamic Acceleration technology (IDA) is a feature that boosts CPU performance when the CPU is running single-threaded applications. This is achieved by temporary increasing frequency of one CPU core when another CPU core is idle, i.e. when the second CPU core is in Deep Sleep or lower power state. How much the frequency is increased depends on front-side bus speed of the CPU:
533 MHz FSB - by 133 MHz
800 MHz FSB - by 200 MHz
1066 MHz FSB - by 133 or 266 MHz