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.
Super Pi shows very little performance differential between the ASRock Z87 Extreme9/ac and the MSI Z87 XPower.