Overclocking
Now that overclocking is achieved by increasing the multiplier on 'K' chips, we used the stock Intel fan - a chunky unit that looks rather similar to the default cooler for the 980X chip - pushed the fan-mode to performance, and then dialled-in settings by tweaking the BIOS on the ASUS P67 motherboard. The top-line 2600K was used.
After a little adventure in the BIOS, involving ramping up the CPU voltage to 1.45V, we arrived at a rock-solid speed of 4,739.2MHz (46x103MHz bus speed). Yup, you've read that right: almost 5GHz with a basic air cooler, and here's the proof.
Yup, you begin to wonder whether the X58 platform is now worth it.