I got a mail concerning the new 0905 CH IV bios ( spamming this in all CH IV related threads )

1.Vcore graph via ROG Connect:

In case a fluctuation of CPU Vcore is observed plz check the following :
- Intel EIST / C1E / C-State / Intel® TurboMode Tech is enabled in BIOS.
- AMD C’n’Q / C1E / TurboCore is enabled in BIOS.
- Load-Line Calibration has not been enabled in BIOS

If any of these is enabled you will encounter Vcore fluctuation...

DDRIII-2000+ support under AMD platform:

Up to 4x DDRIII-2000+ modules can be supported under the AMD models with the 0905 BIOS :
- The use of Thuban processors. (well you still need a good IMC Thuban CPU to achieve this)
- The use of the latest BIOS dating from at least the 22/06/2010 (this counts for M4A89 series and Crosshair IV Formula)
- Ensure you start to load DIMM modules from the black slots if you are not intending to load all four DIMM slots with DRAM.