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M4A785TD-V EVO Bios update

Last response: in Motherboards
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January 5, 2013 4:12:52 PM

Hi guys,

I need to flash the bios to the latest version in order to use 8gb ram sticks (2x8gb gskill). Which are the easiest and safest steps to update the bios of this motherboard? I want to share with you some info I got on the internet. Could this be the right guide to do this task? I think everything is clear except for this step:

Perform a C.P.R. (CPU Parameter Recall) which resets the chipset. Power down, remove power cord from the PSU for 2 minutes and then power up.

What is a CPU Parameter Recall an how is this done? When it says "remove power cord from the PSU", I don´t know which power cord is talking about. Do I have to unplug the cord that connects to the motherboard?

Here is the guide:

EZ Flash 2 – the best, the safest and the most convenient way to update BIOS.

Revised February 4, 2010.

Updating BIOS is serious business!
Every precaution should therefore be taken to prevent that anything goes wrong. Above all: DO NOT USE ASUS UPDATE!!! AFUDOS is the only good alternative to EZ Flash 2.

EZ Flash 2 is a built-in function of BIOS. It is the safest way to update BIOS, because one is not dependent on the operating system, any application, internet connection, firewall settings, antivirus or anything else that can put the vital BIOS update at risk.

On a new build, BIOS can be updated to the latest version before installation of the OS, which may possibly make the installation go smoother and safer.


Note: All what's said below about loading BIOS defaults also applies to the other BIOS update methods (ASUS Update and AFUDOS)!

The PC must never be overclocked during the BIOS update! Always load and save BIOS defaults before and after a BIOS update (press <F5>). By loading and saving BIOS defaults before the update, CPU frequency, memoryfrequency and voltages are set to default (Auto).
Memory timings are set to SPD values which ensure that a PC with high performance memory that need a higher voltage than 1.8V for DDR2 or 1.5V for DDR3 is able to boot on the standard Memory Voltage. Save the default settings (press <F10>) before starting the update.

When these instructions are carefully followed, there will be no need for a CLRTC.

Preparation:


Document all your preferred BIOS settings (i.e. the settings you have changed from the default setting).
Download the BIOS file, which normally is compressed (zipped).
Unzip the BIOS file to a FAT/FAT32 formatted USB Flash Disk with only one partition (or to a Floppy Disk or a CD-ROM). If the unzipped BIOS file is named like e.g. 'P5B-ASUS-Deluxe-1101.ROM', you can rename it to 'P5BD1101.ROM'. Otherwise a truncated name will appear as 'P5B-AS~1.ROM' due to a limitation to max 8 characters in the filename (8.3).

Update:
Reboot.
Press (tap) <DEL> during POST (Power-On Self Test) to enter BIOS Setup.
Load BIOS Defaults (press <F5>).
Insert the USB Flash Disk containing the BIOS file P5BDxxxx.ROM. (Note that the USB Flash Disk has to be inserted before boot to enter BIOS, otherwise it won't be detected).
Save and Exit <F10>. (BIOS will now restart).
During BIOS restart, press <DEL> to enter BIOS Setup again.
Under Tools menu, select ASUS EZ Flash 2. It may take 20 seconds for the drives to show up. Select a drive in the left pane <Tab>. Use <Up> and <Down> arrows and <Enter> to select a drive. If you don't see the BIOS file in the right pane, check the other drives. Note that the drive letters may not be the same here as in Windows.
Select the BIOS file (e.g. P5BD1101.ROM) and press <Enter> to start flashing. Supervise the update, which includes the following stages: Erasing - Flashing (writing) - Verification. BIOS will automatically restart when the update is ready.
Disconnect the USB Flash Disk before/during the restart.
Perform a C.P.R. (CPU Parameter Recall) which resets the chipset. Power down, remove power cord from the PSU for 2 minutes and then power up.
Enter BIOS and load BIOS Defaults <F5> again.
Reenter your preferred BIOS settings - if you are using AHCI or RAID mode, don't forget to set 'Configure SATA as' to [AHCI / RAID]. Also remember the settings for the JMicron Controller, Audio and Memory Voltage. Check also that the Boot Device Priority is ok.
Save and Exit <F10> (automatic restart).
Press <DEL> to enter BIOS Setup and make a final check that all BIOS settings are ok. Save any changes.
a c 299 Ĉ ASUS
a c 1097 V Motherboard
January 5, 2013 4:49:41 PM

Yep that is the best way!
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January 6, 2013 9:59:51 AM

Ok, thanks. But what is a CPU Parameter Recall an how is this done? When it says "remove power cord from the PSU", I don´t know which power cord is talking about. Do I have to unplug the cord of the PSU that connects to the motherboard?

Regards
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l
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a c 299 Ĉ ASUS
a c 1097 V Motherboard
January 6, 2013 12:56:26 PM

NO plug it from the wall.
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January 6, 2013 1:07:28 PM

Ok, thanks. I will unplug it from the wall then. Regarding the CPU Parameter Recall, could someone explain what is this and how is this done?

Thanks a lot again!

TJ
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January 14, 2013 9:52:39 PM

Hi folks! I am glad to tell you BIOS Update was successful. I used the EZ Flash 2 method and worked like a charm! Thanks a lot for your cooperation!

Regards
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!