Overclocking
The ASUS ROG Zenith II Extreme showed quite a bit of headroom for overclocking. I was able to get into Windows at 4.4 GHz and 1.35 V core voltage, and I used this overclock for my power consumption tests. Under heavy AVX workloads, however, I found much less room to work with.
The ASUS ROG Zenith II Extreme goes above and beyond for overclocking aids, with a wide selection of exotic cooling tools and an innovative OLED that operates as a hardware monitor and Postcode. Don't mistake the OLED for a gimmick, either; it displays what hardware each code corresponds to in real time, which is a huge time saver when troubleshooting.
For memory overclocking, the ASUS ROG Zenith II Extreme did well, achieving 4000 MHz at XMP timings and voltages on my Trident Z Neo kit. An impressive feat with four DIMMs at such tight timings.