Sapphire's latest version of its QBios makes overclocking as easy as possible, with plenty of options to tinker with.

The Sapphire Pure Black X79N overclocked the CPU to 4.2GHz stably just by adjusting the ratio limits of the cores, while a small bit of adjustment to the CPU voltage got a stable overclock speed of 4.5GHz.Multi-threaded CPU performance

Sapphire pure black x79n benchmarks

CPU encoding performance

Sapphire pure black x79n benchmarks

Overclocking performance

Sapphire pure black x79n benchmarks