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Dummy's Guide to X79 OC (ASUS)

Heya folks, 
 
I'd like to add a small addendum to an already quite extensive list of OC setups and methods available here and the forums. 
 

Preamble

 

I've had a fair bit of struggle trying to get into overclocking, and have been scouring the web including this community site to learn about the steps involved in a successful configuration, which in my impatience means a stable OS environment that can withstand one cycle of Intel Burn Test. After a while, my search narrowed to just identifying and inputting values into respective bios entries, to ascertain that the base set of settings for a simple overclock is sound before attempting anything more complicated.

 

Then I have come upon this Youtube video of a ROG representative going into depth explaining overclocking setup for their X79 boards.

 

ASUS: How to Overclock an Intel X79 SandyBridge-E Motherboard

 

At the very least, it allowed me to get past the dreaded cold boot problem that I was having, and I would like to deliver the settings that were tweaked for those who would just want to try the values without watching the entire hour of video. But I'd suggest you do if you want the background info on what each entry means.  

 

I'd like to mention the board I'm using is Sabertooth X79 motherboard with recent 3009 bios update. The CPU overclocked is i7 3820. 
 
First order of things is to make sure the initial setup of your PC goes smoothly, with all settings as they are at default. I'd run a few benchmarks and even some games to ascertain whether there is any problem before delving into any overclocking tweaks. 
 
If your PC system is stable, then it is time to enter into the bios. Restart the computer and press DEL or F2 at the splash image to enter into bios interface. 
 
The default BIOS screen will be set to simplified interface. Press F7 to enter into Advanced Mode. 

 
 

In Advanced Mode, you will notice the tabs on the top of the interface. They are, from left to right, Main, Ai Tweaker, Advanced, Monitor, Boot, and Tool. Click on Ai Tweaker. 

 


Ai Overclock Tuner:  

set to 'Manual' 

XMP allows automatic settings to memory timings, but may be too aggressive 
 

BCLK:           

set to default, which is 100.000. Do not raise this value over 103.00 

 

CPU Strap:  

set to 125MHz 

 

Memory Frequency:  

It is recommended to keep the memory at its rated speeds, especially for denser  memory modules. 

You can go into shortcuts by pressing 'F3' and check out the SPD information on your memory modules 

 

Turbo Ratio: 

Per Core option allows overclocking flexibility for applications that use few cores but for my purposes, I left it at 'By All Cores' 

 

700

 

DRAM  Timing Control 

 

I have used the default setting for the RAM specifications here. One can also set these settings on 'Auto'. 

 

700

 

DIGI+ Power Control 

 

CPU Load-line Calibration: 

Counters Vdroop on CPUs, set it to Medium or High 

 

CPU Current Capability: 

Set it to 130% 

 

VCCSA Load-line Calibration: 

Set it to 'Regular' 

 

VCCSA Current Capability: 

Set it to 120% 

 

VCCSA Boot Up Voltage: 

Leave it 'Auto' 

 

CPU Voltage Frequency: 

Set it to 'Auto' 

 

CPU Spread Spectrum: 

Set it to 'Disabled' 

 

CPU Power Duty Control: 

Set it to 'T. Probe' 

 

CPU Power Phase Control: 

Set it to 'Optimized', good for overclocks from 4.6 to 4.8GHz 

 

DRAM -AB and DRAM -CD Current Capability: 

Set it to 120% 

 

DRAM -AB and DRAM -CD Voltage Frequency: 

Set it to 'Auto' 

 

DRAM -AB and DRAM -CD Power Phase Control 

Set it to 'Optimized' 

 

700

 

 

CPU Performance Settings 

Leave all settings on 'Auto' 

 

700

 

Now back to Ai Tweaker: 

 

CPU VCORE Voltage: 

This differs from CPU to CPU. I honestly think for my i7 3820, 1.370V seems to work okay, but I  

may feel safer with 1.380 ranges. I would not exceed 1.410 on overclocks between 4.6 to 4.8GHz 

The ASUS rep also suggested to go for Offset of +0.200 if one wants to opt into power saving states 

 

CPU VCCSA Voltage: 

Manual Mode 

 

CPU VCCSA Manual Voltage: 

Set it to 1.100, do not go above this figure 

 

DRAM Voltages: 

Leave it at specified voltage ratings for your RAM 

 

CPU PLL Voltage: 

Set it to 'Auto' 

 

VTTCPU Voltage: 

More or less matches CPU VCCSA voltage, set it to 1.100 

 

700

 

 

At the bottom of Ai Tweaker section: 

 

CPU, PCIE Spread Spectrum: 

Set it to 'Auto'. Other guides recommend leaving them 'Disabled' for better overclocking. I  

guess for overclocks below 4.8, it may or may not help. 

 

 

700

 

 

Go to Advanced Tab, then into CPU Configuration 

 

Intel Adaptive Thermal Monitor: 

Set it to 'Disabled' 

 

700

 

Go into CPU Power Management Configuration 

 

I left it all 'Auto'. If you use offset for CPU Voltage, then leave them enabled is going to help prolong the life of your CPU. Other guides recommend turning them off to prevent starving CPU of required power. 

 

700

 

As a last step, go to the Monitor section 

 

There is Anti Surge Support option at the bottom 

Set it to 'Disabled'  

 
I suggest you save the setting into a profile that can be done via the 'Tool' section. 

 

Restart the computer with changes to take effect by pressing 'F10'.  

 

With the settings above, I was able to boot into Windows without problem. I will have to run some benchmarks in order to gauge its stability, but I was surprised at how cold boot problem was gone. I suspect that it was primarily due to me conflating 'BCLK Frequency' and 'CPU Strap'.  

 

Well, that's it for now! Good luck on your overclocking (although I'm sure that all of you will certainly have more experience in this), and most importantly have fun!

 

 

 

 

Reference: 

 

ASUS: How to Overclock an Intel X79 SandyBridge-E Motherboard 

 

Comments (6)

Is there anything like this for Gigabyte's X79 boards?
I have both on 2 separate rigs so I would like to see one for Gigabyte also. Thank you for posting this guide though, Big help!
I found this guide thread while browsing the X79 board:
http://www.overclock.net/t/1189242/sandy-bridge-e-overclocking-guide-walk-through-explanations-and-support-for-all-x79-overclockers
It is as helpful as it is in depth, and makes for an interesting reading. Plus, the board used as example is a Gigabyte X79 board. I hope it helps!
Thanks for the info Overpass!!!!!
Great info - thanks
Nice i look for the P9x79 Deluxe one can some one help ?
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