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Maximus II Formula Club
Maximus II Formula owners, you are invited to join us and share your experiences with this very sexy and
subdued board. Everything is related to the board goes here, from cooling to overclocking or any wicked
modifications are all welcome. Let show off your overclocking talent or pictures of your rig that you’re proud of.
MIIF featuring the latest Intel P45 Chipset and support for high speed DDR2 memory and ATI Crossfire technology,
the new Maximus II Formula brings high performance motherboards to a new level. It’s designed to be overclocked
to the max.
Latest official BIOS
version 1307 (09/03/08) Improve Memory compatibility and with some PCI-E Raid Card
version 1403 (11/03/08) fixed 45nm Quac Core CPU stability issue
version 1501 (11/06/08) fixed wrong Vcore display in Ai Suite
version 1802 (12/10/08) Fixed use 2 pieces of ATI4870X2 VGA Card can't display from Primary slot display monitor
version 1901 (12/31/08) Improve Memory compatibility
version 2104 (05/05/09) Improve Memory compatibility
Update: (11/12/08) Asus pulled off the 1501 and 1403 bios. There're reported, some bugs in the those bios. DON'T USE IT IF YOU HAVE THESE VERSION OF BIOS.
Asus Download Site
http://support.asus.com/download/download.aspx?SLanguage=en-us
Asus FTP Site
ftp://ftp.asus.com.tw/pub/asus/mb/so...mus_II_Formula
MIIF’S BIOS has some new settings compares to the sibling Maximus Formula board and you can find some
definition for these settings in the manual book but some don’t even have the explanation what the new features does.
I’m going to list the most important common one.
FSB STRAP TO NORTHBRIDGE
This is a fairly new feature to Intel chipset boards, it did throw us old timers for a loop when they first came out.
The northbridge is actually its own processor which is tied or “strapped” to the front-side bus and memory, it’s
possible to change the speed of the strap. You can manually setting the speed of the northbridge strap, you can
change the memory clock speeds by simply increasing the front-side Bus speed will automatically increase the
speed of the memory or notching the strap down, you can get your RAM operating within pecification and while
leaving the FSB at its oveclocked state.
For more detail explanation about Bios definition
click here http://forums.pureoverclock.com/showpost.php?p=10897&postcount=2
CPU GTL REFERENCE (0/1/2/3)
Maximus II Formula uses a different method for setting the GTL Ref voltages than any other boards.
They do not simply have a multiplier, the multipliers are fixed and you have entered a "Y value” or “Item value”
that modifies the resultant voltage. If you have 45nm CPU, you are aiming for the voltage given by the
0.635x multiplier, so to work out what to put for the 0.667x GTL Ref (Item) values (it will be a negative
number to make the resulting voltage the same as the 0.635x GTL Ref voltage). You’re probably wondering
how to figure out the “Y or Item” value by now.
Here is the equation you can use to find out your CPU GTL value.
Equation for 45nm processor
Vtt x 0.667 + Item = Vtt x 0.635
What is Vtt?
It’s front-side bus (FStermination voltage
Example:
45nm CPU
FSB Termination: 1.35v
Formula:
Vtt x 0.667 + Item = Vtt x 0.635
1.35v x 0.667 + Item = 1.35v x 0.635
0.90045v + Item = 0.85725v
Item = 0.85725 – 0.90045
Item = - 0.0432v
Item= -43mv
Now round up to the nearest selectable value in the bios is -40mv and set the 0.667x Item value
to -40mv (negative), usually the (1 &3) core.
You have now made the 0.667x GTL voltages as close as possible to the 0.635x GTL voltages.
Bios setting Example:
CPU GTL REFERENCE (0) Auto
CPU GTL REFERENCE (1) -40mv
CPU GTL REFERENCE (2) Auto
CPU GTL REFERENCE (3) -40mv
Notice:
If the negative value is unstable then you might have to try the positive value and you also have to
tweaking it by trial and error until you find the stable value for your processor.
Equation for 65nm processor
Vtt x 0.635+ Item = Vtt x 0.667
Example:
65nm CPU
FSB Termination: 1.35v
Formula:
Vtt x 0.635 + Item = Vtt x 0.667
1.35v x 0.635 + Item = 1.35v x 0.667
0.85725v + Item = 0.90045v
Item = 0.90045 - 0.85725
Item = 0.043v
Item= 40mv
Now round up to the nearest selectable value in the bios is 40mv and set the 0.635x Item value
to 40mv (positive), usually the (0 &2) core.
You have now made the 0.635x GTL voltage as close as possible to the 0.667x GTL voltage.
Bios setting Example:
CPU GTL REFERENCE (0) 40mv
CPU GTL REFERENCE (1) Auto
CPU GTL REFERENCE (2) 40mv
CPU GTL REFERENCE (3) Auto
For thoroughly detail explanation of GTL ref voltages
click here http://www.thetechrepository.com/showthread.php?t=87
DRAM CLK (CLOCK) SKEW ON CHANNEL A1/A2/B1/B2
In a nutshell, clock skew is the variation in speed of a module’s individual signal paths to the memory controller.
Skew is the result of the signal distortion caused by the traces in the motherboard, the cleanliness of the power
going to the board and the RAM that’s in use. Tweaking the skew settings can help increase stability when you’re
pushing the chipset and RAM to its limits by overclocking. Tweaking clock skew is a game of trial and error but if
you have got the time and energy, it could help you achieve the few extra megahertz you were hoping to get out
of your system.
Gentelment start you engines!
Reply With Quote
sharp Idea !!
Originally Posted by grumpydaddy
Max II hang at Post
