With Sandy Bridge and Ivy Bridge, standard Core i5 and i7 processors offer enough multiplier headroom for 400MHz overclocks. K-series chips are only required to push higher. Things are different for Haswell, which removes the multiplier allowance for standard CPUs, making multiplier-based overclocking exclusive to K-series processors."
There is a lot of free Microsoft software to be had, programs which enable better web surfing and help protect against spyware are just two types. PCSTATS Tips