Super Pi is used by a huge audience, particularly to check stability when overclocking processors. If a system is able to calculate PI to the 2 millionth place after the decimal without mistake, it is considered to be stable in regards to RAM and CPU.
We used Super Pi's '32M' benchmark setting.
Even though the 4770K will turbo up to a maximum of 3.9GHz when one core is active, Super Pi shows performance benefits when fast memory is used.