try installing this AMD Chipset Driver V3.0.825.0 for Windows 64bit XP & 64bit Vista & 64bit 7...those boards are controlled by SB 950 controller...so am guessing they are either disabled by bios...or not responding because they dont have the drivers installed...
http://www.asus.com/Motherboards/AMD_AM3Plus/Crosshair_V_Formula/#download
let me know what happens...have the board lying around but no proccy...so cant really replicate ur issue in real life
http://www.asus.com/Motherboards/AMD_AM3Plus/Crosshair_V_Formula/#download
let me know what happens...have the board lying around but no proccy...so cant really replicate ur issue in real life




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