We have new official BIOS releases for the P8P67 Deluxe, P8P67 Pro, EVO, Standard, Sabertooth and Maximus IV Extreme boards today. Although this BIOS is a down version from 1253 (beta) it includes most of the 1253 changes and is officially released. Additional BIOS releases for the balance of our P67/H67 product lineup will be released shortly and we will have another major BIOS update (13xx series) in the near future with user enhancements, memory profile updates, and tuning enhancements based on user feedback.

P8P67 Deluxe, Pro, EVO, Standard, Sabtertooth -
Change Log -
- Removes full reset at POST (double post) on cold boot or auto overclocking routine.
- Improved OC performance using Multipliers or Auto Overclocking
- Improved BCLK and DRAM OC capabilities when enabling the “Internal PLL Overvoltage” option in BIOS.
- Minor Bug Fixes including Auto Rule for C1E, C3, C6 is returned to Enabled first (1253 disabled first) and improved USB compatibility.
- Enabling Internal PLL Voltage will still cause resume/hibernate issues (Intel related) but we are working with Intel on any potential workarounds. For those users not needing a 47x or higher multi on the K series we recommend leaving this option disabled.
Maximus IV Extreme -
Change Log -
- Improved OC performance using Multipliers or Auto Overclocking
- Improved BCLK and DRAM OC capabilities when enabling the “Internal PLL Overvoltage” option in BIOS.
- Minor Bug Fixes

1. If any of the following devices are not detected or not usable:
- Devices installed on PCIEx1_1 slot
- Devices installed on PCIEx1_2 slot
- The additional SATA6G port from Marvell 9128
- eSATA controller
- Devices installed on PCI_1 slot
- Devices installed on PCI_2 slot
- Onboard 1394 controller
- Second LAN
Please check the device manager under 'Storage controllers' , look for a device with the name 'ACS-6xxxx'. The manufacturer is 'Accusys Inc.' and will have an exclamation mark next to it.
This driver may be installed automatically when users run Windows Update, which causes a malfunction of these devices. Please uninstall the driver,reboot, and then those devices/slots will be available. We have asked MS to pull this driver from the auto update procedure.
2. If you are receiving random BSOD (Blue Screen of Death) under Windows 7 OS without any warning at stock or what appears to be stable OC settings, please download the following patch from Microsoft to have the problem fixed (98% fix rate): This hotfix will be in SP1.
http://support.microsoft.com/kb/979444
3. If you are experiencing long boot up times (greater than 30 seconds) or slow performance of SATA HDD or SSDs, please remove Intel RST 10.1.1008 if you have it installed and use the Intel boxed AHCI driver in Windows 7 or Windows VISTA. For XP users please try IDE mode until Intel releases a new update. The new update will also include full support for bootable RAID arrays over 2TB in size along with other bug fixes/performance enhancements specific to P67 (new firmware will be released to the board manufacturers also).
4. If you are still unable to install AiSuiteII after using the Patcher file, you might be using a COA hack for Windows 7. Please reinstall OS without the hack and it will work. If you are sure the OS install is hack free, then please PM me.
5. If you are unable to enable SLI support with various versions of Nvidia drivers (especially 266 and up), please reinstall the OS with the latest BIOS installed. I know this is drastic, but the SLI key format has changed and the OS might not recognize the new key in the updated BIOS (especially if non released NV drivers were previously installed, drivercleaner will not clear this setting during an uninstall). This should not occur in future BIOS releases.
6. If you are unable to display BCLK properly, not able to overclock under the OS (including Auto Tuning)…etc, please ensure the Intel MEI driver from the support CD or latest version from Intel has been installed. All controls related to the CPU are controled by the MEI under the OS and several even in UEFI mode. I think this is a must install under the Sandybridge platform even if you manually overclock.
7. If the power saving features not working after updating to BIOS 1253, please verify the power profile has been set to balanced mode instead of Performance Mode. As long as EIST is not disabled or CPU Voltage is to manual mode (use offset), the power saving modes will continue to operate normally. In addition, if you have enabled Internal PLL Voltage, then resume/hibernate will not work correctly until Intel has an update (or this might end up being standard operating mode).
8. The differences between the EPU switch, UEFI EPU option, and EPU under AiSuite II is as follows:
- EPU Switch: Once enabled, it will enable EPU option in BIOS and default to auto mode.
- EPU option in UEFI: Various options are available to select the level of power saving (lowering Vcore voltage when the system load decreases). Both the BIOS option and EPU switch will not effect performance, however stability at high overclocks will depend on the quality of the CPU and DRAM used.
- EPU under AiSuite II: Same as previous generations, 3 modes to choose from, AUTO (dynamic change multiplier and Vcore based on CPU load), High Performance (EPU OFF), and Max power saving (Drop CPU multiplier to lowest multiplier with relative VID decreases).

We will have a new BIOS set for the P67/H67 boards in about a week that will offer improved performance profiles, tuning, and bug fixes.