The first thing any self-respecting enthusiast should do is to load the "Extreme OC Profile", which sets optimal values all the PWM controls and turns off anything that will inhibit the overclock. Usually the only voltages you need to touch are the CPU, CPU-NB and DRAM. Everything else can be left at Auto.

121024154732 ASUS ROG Crosshair V Formula Z (990FX) Review ft. Vishera FX 8350 on Phase Change

121024154807 ASUS ROG Crosshair V Formula Z (990FX) Review ft. Vishera FX 8350 on Phase Change

 

This is the sub-menu for the PWM controller parameters. To prevent heavy vdroop or overshoot, ASUS recommends you set the CPU LLC to High for typical air/water and Ultra High for subzero overclocking.

121024154755 ASUS ROG Crosshair V Formula Z (990FX) Review ft. Vishera FX 8350 on Phase Change

 

The DRAM configuration is also very comprehensive, with the capability to modify primary and secondary timings as well as the expert drive strength settings. We hope the ROG team will add more memory profiles for the other memory chip manufacturers like Hynix, Samsung and BBSE. The BIOS does come with XMP support so your favourite Intel certified rams should work here, although you might need to raise the default 200MHz base clock as the memory frequency multiplier tops out at 2400MHz.

121024154742 ASUS ROG Crosshair V Formula Z (990FX) Review ft. Vishera FX 8350 on Phase Change

121024154748 ASUS ROG Crosshair V Formula Z (990FX) Review ft. Vishera FX 8350 on Phase Change

 

Behind the Advanced tab, you will find a CPU Configuration menu that is also very important – you will want to disable everything here except HPC Mode to prevent unpredictable throttling and clock fluctuations.

121024154813 ASUS ROG Crosshair V Formula Z (990FX) Review ft. Vishera FX 8350 on Phase Change

 

Some enthusiasts like to selectively turn off some cores here to get more ambitious clock speeds.

121024154827 ASUS ROG Crosshair V Formula Z (990FX) Review ft. Vishera FX 8350 on Phase Change

 

When paired with the elusive ThunderboltEX expansion card, the C5F-Z joins the handful of high speed Thunderbolt enabled motherboards and devices. At time of writing, neither the board nor the expansion card is certified by the Thunderbolt standards body yet, which is rumored to have implications for Windows 8 support.

biostb ASUS ROG Crosshair V Formula Z (990FX) Review ft. Vishera FX 8350 on Phase Change