Hey guys! This is a short introduction to my mod for my Asus P6T Deluxe V2
which I have crossflashed with a modded P6X58D-E / P6TWS Pro
BIOS. The former allows me to use a much newer Intel Option Rom (OROM) for my 2 x 2TB SSHDs in RAID-0 and contains the option to use a voltage offset (which the original BIOS did not have). Thus I was able to use a Xeon E5645 @ 2.4 Ghz @ 1.03 V at idle (runs @ 3.8 Ghz @ 1.18 V under load). Also thanks to the new OROM I get better results for my SSHDs. Use it at your own risk, you'll find the ROMs below.
As I have upgraded my CPU to a X5650 / X5675, I have also uploaded a modified P6TWS Pro BIOS with the newest Microcode, but with an older 10.x Intel Option ROM with TRIM support though.
Advantages: 1) High TDP lets you overclock beyond the TDP limit of your CPU (this is beneficial to OC CPU's with a low TDP), 2) Turbo mode can be disabled to increase stability, 3) unbuffered ECC-RAM support which increases stability (unbuffered ECC RAM works with the other BIOS in non-ECC mode as well)
Disadvantages: 1) No dynamic voltage regulation, 2) no newer Intel Option Roms beyond 10.x, 3) Firewire does not work 4) possibly some of the PCIe x4-slots may not work 5) same ASUS Express gate issue as stated below
- much newer Microcode (from June/August 2015) for Nehalem and Westmere CPUs (CPUID: 06A4, 06A5 and 06C2), deleted support for engineering samples (CPUID: 06A0 and 06C0)
- Intel Option ROM: 8086-2822_v15032675.bin (tested and works with my 2x 2 TB SSHD RAID-0, also got it to work with the newer 8086-2822_v15102545.bin and versions below, all OROMs newer than that fail to load the RAID array due to size)
- deleted the ASUS splash screen
The mod153mc3 version contains all of the above and additionally uses a modified Marvell LAN Option ROM (same version 11ab-4380_v66813.bin) which is untested and might not work due to size.
What is known not to work?
- the top PCIe x4 slot doesn't work anymore
- ASUS Express Gate is recognized as a *HiSpeed* USB Mass Storage Device, which can be disabled in Windows
- the CPU TURBO cannot be disabled
Assuming you are currently on the stock BIOS of your P6T Deluxe V2, you'll need to flash the new BIOS with an engineering version of AFUDOS. EZFlash won't accept it! The file provided here is AFU236U.exe and will do the job.
You'll need a bootable USB stick with the aforementioned AFUDOS version and the BIOS file. Make sure that it runs in HIGHMEM mode or you'll get an error while trying to flash the BIOS. You can use unetbootin to create a FreeDOS 1.0 bootable USB stick, and select "Live CD...With HIMEM" while booting. Next you need to type "cd C:\" to reach the main USB drive and execute the "afu236u /i[BIOS file name].rom /pbnc /n" command. This was with the AFU236U and BIOS file placed directly into the main directory on the USB stick, not in a subfolder. After restart, you should be greeted with the new BIOS.
*updated both BIOS files with new Microcode for Nehalem and Westmere from May 2018* --> mod156 for the P6X58D-E / the p6tws4 for that board.
*added info how to create a bootable USB stick* December 2019
As I no longer own that board as of May 2020, I cannot continue to support my mod. I've attached the last versions of each modded BIOS files below.