The ASUS X99 BIOS is by far the best I’ve tested for this platform out of the three vendors who have released their X99 boards for review. The expertise of the ASUS BIOS team shines through: the BIOS is incredibly fluid, reliable and brimming with features. Literally everything you could possibly think of is available to tweak and tune which is essential for a platform like X99 where overclocking and performance is so central. Below we’ve tried to show you all the great things the BIOS does but I want to draw your attention to the Extreme Tweaker tab. For most people who will delve into CPU and DRAM overclocking this area is just a god-send. You can tweak and tune just about every voltage, frequency, set of timings, operation mode and more. For most people the Auto settings suffice but in the instance where you know a certain thing is holding you back it’s nice to know you can target it directly, for instance if your system is posting a System Agent error (which the R5E’s Debug LEDs will clearly tell you) then you can bump up the System Agent voltage.