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(Updated -Part II)= = Offset Mode Overclocking Starter Guide and Thread= =

post #1 of 369
Thread Starter 
107
Part I-Sandy Bridge/P8P67 Pro

I tought it would be good idea to open up a thread/guide that will cover only one overclocking future which is Offsed Mode and inject some fun into overclocking SB
For those interested in achieving "medium~high" overclocks with Sandy Bridge I5/7 CPU's using Offset Mode to control your voltages/temperature and prolong the life of your CPU, I thought I'd share some information and my findings ( you will see a lot of quotations from various sources related to this topic which i found very helpful) . I know/hope that typical user of OCN forum is probably quite technically savvy .I will tried to keep things as simple as possible, while providing enough information to help further understanding of this feature.

Brief explanation of Offset Mode and why you might want to use it.
Both temperature and voltage kills a CPU
"At stock, Intel’s power saving features such as SpeedStep, EIST and C-States are active. Under light loading conditions, SpeedStep reduces the CPU multiplier thus lowering the operating frequency. EIST dynamically lowers the VID while various C-States sends parts of the processor into
low power or off state to help save power consumption.

As we increase the processor’s operating frequency, we’re going to need to increase VCore in order to facilitate higher switching frequencies of the processor core.
The conventional method of doing this is simply to set voltage control to manual mode and type in the required voltage for stability at the selected operating frequency.
However, the side effect of using this method is that the applied voltage code (VID) remains static under all loading conditions so we end up increasing power consumption and heat production under light loading conditions unnecessarily.

The workaround for this is to use Offset Mode in BIOS to set the processor’s operating voltage."
Rog Offset Guide

This little guide is intended for someone that already know the voltage required for particular frequency using Standard- manual/fixed method he/she is shooting for

If you don't :
"DVID Offset: With SB and SBe we have SVID, and SVID will change the VCore unless the VCore is explicitly set. At 4 GHz my VID will be 1.30v, at 4.1 it will then be 1.315v, at 4.3 it will be 1.335v. Setting DVID is setting a positive or negative offset onto that VID. The issue is that VID changes with frequency, so if you set a +0.100v offset, at 4GHz it would be 1.4v, at 4.1 GHz it would be 1.415v, and at 4.3 GHz it would be 1.435v. You can’t control the final VID on these CPUs, so I do not recommend using DVID offset, but if you want the voltage to drop when the frequency drops then you need to use it. Please set the maximum frequency you wish to achieve, and disable all power saving features (EIST, C1E, C3/C6 states). Then boot into Windows and then restart and go into BIOS. Your max SVID bin for that frequency should now be your VID. Set the offset off this voltage, and then save, that will be your max VCore. If you increase the frequency more, then do that again, SVID might or might not change the VCore."
Source
You can also get the reading of the RealTemp when under load
430
VID/VCORE (Click to show)
coretemp help faq's-VID is not the same as VCore. VCore is the actual voltage the processor is being fed by the motherboard.
VID is the recommended voltage the processor should be running at at the current power state, this is a predetermined value, programmed by the CPU manufacturer. When the processor settings, especially the VCore is kept at default settings, Core Temp will provide a good approximation of the real VCore, but if you change the setting using the BIOS or by other means, Core Temp's VID readings should be ignored.


You will only have to change few Bios setting in order to switch from Manual to Offset Mode;

Load-line Calibration

This is probaly the most important setting which will determine how successful/stable your offset will be especially at higher frequencys and play big role on how low your idle vcore will drop before you starve the CPU and cause BSOD or freeze under idle/light load

There is a small side effect with offset especially if you want to use all c State enable ...there are some reports that if you disable c3,6 it will mess up your SSD especially RAID performance drastically (since i only have one SSD the difference is minor but it's there ) so i tryied to run /set up every offset with all c Sate enable ,i quickly realize that my idle vcore limit on this CPU is around .970~1.000v when all c State are enabled (that's when i will BSOD/freeze )if i disable c 3,6 my idle vcore rises about .040v so for my OC of 4.7 (my 24/7 offset) and up i can run LLC @ regular/medium/high -no problem (remember) there is no two processors alike if you start to BSOD or freeze just disable it
C3/C6-EIST/ C1E Explained (Click to show)
Raja (Asus rep)- "It puts cores into a "park" deep sleep state, basically shutting off all clock cycles on several cores. And it can cause problems at idle or especially light load, as the vcore sometimes does not ramp up enough, plus, the data has to be cached into L3 cache in order to be recovered. Someone tested it and during light load, 1 thread stress, he only had 1.32v going to the chip, when with C3/C6 disabled, he had 1.36v. And he needed that 1.36v for stability."
-User(HardForum) ".. when i am in windows and open cpu-7 it shows 1.400v then when i start prime95
my volts go down to 1.368 in that normal.."
-Raja.."Yes that's perfectly normal, because of vdroop.
C3 and C6 are basically useless unless you want to save pennies a month on electricity.
C1E and EIST is what you want to use. C1E is controlled by hardware and EIST is controlled by software. As already been discussed, there's an "issue" with some Asus bioses where EIST remains enabled even if its disabled in the BIOS, but it looks like they are addressing that.

If you want your CPU to downclock and downvolt when idle (no it doesn't add any wear and tear to it), you must have either EIST or C1E enabled. C1E overrides all OS settings for power plan, but both can be toggled on or off in realtemp 3.67, so you can experiment. .."

For now I will only cover setting up Offset Mode between 4.5~5.0 Ghz espacilly 4.7 since this is pretty common OC .

Here are the bios settings you want to play with:

Note;Highest LLC=lowest idle Vcore/ Vdroop/Minimum Peak Overshoot (recommended for high OC)

Vdroop<= with the 2103 Bios i haven't noticed a lot of Vdroop especially across all LLC levels @ 4.7,at x50 Ultra High LLC come in handy and keep my voltage constant ,in comparison to the previous bios i think this are pretty good for offset thumb.gif


Choose Appropriate LLC Level :

-Regular (0%)-Best power saving
recommended for x45
( c3/6 disable) x45 LLC REGULAR (Click to show)
I had to figure out what was my stable Vcore under Manual/fixed in bios (run P95 1344/1792 stress test 15~25 min)
Bios Settings:
AI OC Tuner: Manual
BLCK: 100
Turbo: per core 45
Internal PLL Overvolt: Disabled
EPU Power Saving: Disabled
Load Line Calibration: Ultra High
VRM: Manual @350
Phase Control: Extreme
Duty Control: Extreme
CPU Current: 100%
CPU Voltage 1.31v (in bios) and CPU-Z fluctuation of (1.296~1.304v)-STABLE
Turbo ;Enabled
CPU Ratio ;Auto
CPU Spread Spectrum: DISABLE
Offset +.03/LLC Regular give me idle above 1.008v/Medium LLC will idle .976v
(disable c3,6)
idlex45regulatoffset03.png

Bios settings;
120219232201.png

Test (CPU-Z fluctuation under load 1.296~1.312v-surprisingly small Vdroop for LLC -Regular )
loadx45regularoffset03.png
107
-Medium (25%)
very nice and balanced x45~49 multi
105
-High (50%)
good balance and performance x47~50 multi
recommended for higher clocks
x47 LLC HIGH (Click to show)
Manual/fixed in bios
Bios Settings:
AI OC Tuner: Manual
BLCK: 100
Turbo: per core 47
Internal PLL Overvolt: Disabled
EPU Power Saving: Disabled
Load Line Calibration:Ultra High
VRM: Manual @350
Phase Control: Extreme
Duty Control: Extreme
CPU Current: 120%
CPU Voltage 1.39v (in bios) and CPU-Z fluctuation of (1.344~1.369v)-STABLE
Turbo ;Enabled
CPU Ratio ;Auto
CPU Spread Spectrum: DISABLE
Offset +.035/LLC High give me idle above 1.000v (c3,6 disable-idle 1.040v)/Medium LLC will idle 1.064v
snaphsot0009.png
(CPU-Z fluctuation under load 1.368~1.376v- LLC -Regular/Medium/High )
Ultra high LLC was to much- idle Vcore dip down well below the idle limit (no boot)
snaphsot0008.png
106
-Ultra High (75%)
"all systems go !"-high perfprmance/biggest voltage spike between idle-load (@4.7 ,i couldn't boot with c3,6 enabled) x48/49 and up
106

Phase Control:
"Phase Control: “Standard” and “Optimized” are adequate for most loading conditions. If pushing processors past 4.8GHz, then Extreme or “Manual” with “Ultra-Fast” is recommended."

Note that on the ROG boards; Phase Control needs to be set changed from Extreme to Standard, Optimized or Manual in order for Offset Mode to become available in the CPU Voltage menu.


-Optimized-Asus recomends this phase for offset mode ,i can use this phase for all my offsets no problem
277
-Extreme-this is your other option (if you have stability issues especially at higher frequency)
283

Duty
-Extreme-recommended
"Duty Control: Sets the conditions for load balancing across phases. “T.Probe” monitors phase thermal conditions and balances load accordingly. “Extreme” balances the current load across all FETs irrespective of thermal conditions."
Since i flashed to new bios (2103)i run multiple tests to give you rough idea of LLC level in comparisson to
voltages,this is based solely on my own CPU and may or may not work for you.


spreadsheetoff.png


You will have to run stress test of your choice to observe you idle /load vcore and make unnecessary adjustments until you get as close as you can to your manual/fixed/stable vcore under load.
This very nice and quick test that works like a charm for me :
(costume P95 with 90% of your RAM)
376 x 50 LLC Ultra High (Click to show)
x50llcultra.pngoffsetx50llcultra.png
My x47 positive/negative offset comparison (Click to show)
455
You can clearly see why i choose positive offset thumb.gif
533
Helpful Links: (Click to show)
I invite others to post their own experiences and results.
Ai Tweaker
Ai Overclock Tuner:
Turbo Ratio:
By Per/All Cores:
PLL Overvoltage:

Additional Turbo Voltage:

Ai Tweaker (in the DIGI+ VRM section)
Load-Line Calibration:
VRM Frequency:
VRM Fixed Frequency Mode:
Phase Control:
Duty Control:
CPU Current Capability:
CPU Voltage:
DRAM Voltage:
VCCSA Voltage:
VCCIO Voltage:
CPU PLL Voltage:
PCH Voltage:
CPU Spread Spectrum:

Advanced\ CPU Configuration >
CPU Ratio:
Limit CPUID Maximum:
Execute Disable Bit:
Enhanced Intel SpeedStep Technology:
Turbo Mode:
C1E:
C3 Report:
C6 Report:

NOTE: This thread is work in progress ,i will update some of the new info on daily bases
Edited by coolhandluke41 - 5/7/12 at 9:18pm
    
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post #2 of 369
Thread Starter 
Part II -Ivy Bridge/ UD5H

Note ; this settings are P95 stable but not BF3 (+.03v) -will update soon

Since i establish my 24/7 stable clock for IB i will share same of the settings you may want to try on this particular platform which i found very easy to work with

some of the settings that worked for me ;

Idle Temps @4.7 Offset Mode
394

407

Here is stable Fixed screenie (1.22v in Bios/CPU-Z load of 1.2v~1.212)

338

Here is Offset (Low LLC +.095 /CPU-Z load of 1.2v~1.212v and Idle of 1.020v )

382

Bios settings :

450450
450450450


The OverClockers BSOD code list


BSOD codes for overclocking
0x101 = increase vcore
0x124 = increase/decrease QPI/VTT first, if not increase/decrease vcore...have to test to see which one it is
on i7 45nm, usually means too little VVT/QPI for the speed of Uncore
on i7 32nm SB, usually means too little vCore
0x0A = unstable RAM/IMC, increase QPI first, if that doesn't work increase vcore
0x1A = Memory management error. It usually means a bad stick of Ram. Test with Memtest or whatever you prefer. Try raising your Ram voltage
0x1E = increase vcore
0x3B = increase vcore
0x3D = increase vcore
0xD1 = QPI/VTT, increase/decrease as necessary, can also be unstable Ram, raise Ram voltage
0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances
0x50 = RAM timings/Frequency or uncore multi unstable, increase RAM voltage or adjust QPI/VTT, or lower uncore if you're higher than 2x
0x109 = Not enough or too Much memory voltage
0x116 = Low IOH (NB) voltage, GPU issue (most common when running multi-GPU/overclocking GPU)
0x7E = Corrupted OS file, possibly from overclocking. Run sfc /scannow and chkdsk /r

BSOD Codes for SandyBridge
0x124 = add/remove vcore or QPI/VTT voltage (usually Vcore, once it was QPI/VTT)
0x101 = add more vcore
0x50 = RAM timings/Frequency add DDR3 voltage or add QPI/VTT
0x1E = add more vcore
0x3B = add more vcore
0xD1 = add QPI/VTT voltage
“0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances”
0X109 = add DDR3 voltage
0x0A = add QPI/VTT voltage


credit goes to all who contributed
Edited by coolhandluke41 - 10/8/12 at 1:17pm
    
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post #3 of 369
Quote:
Phase Control:

-Optimized-Asus recomends this phase for offset mode ,i can use this phase for all my offsets no problem

1. I have to use Extreme or I get sudden black screens or random boots (even after 8 hours of prime95 stable). Sounds weird but Extreme also lowers temperature by 2-3 degrees (celsius).

2. I'm watercooling and T-probe works for me. I just decide to use it from the start, because Asus says its designed for watercooling to keep regulators not to get burned.

what the heck, maybe I just post 5GHz settings I'm using:

BLCK: 100.0
Multi 50x
PLL: Auto
VRM: 350
LLC: Ultra High
Phase Control: Extreme
Duty Control: T-probe
CPU Current: 140%
CPU spread spectrum: Enabled
CPU Voltage: 1.425 (this actually gives 1.425V-1.432V under load)
VCCIO: 1.100

with offset use:
CPU Voltage
mode sign +
0.040 (it gets me exactly same voltage as putting it manually to 1.425)
everything else exactly the same as manual. Idle voltage drops to 1.040 or so @ 1600MHz. This chip is capable of 0.80 vcore at 1600Mhz, but I think thats impossible to get on current bios?.

almost forgot; All CPU settings ENABLED except:
Virtualization
Limit Maximum
Edited by Icemint - 2/23/12 at 12:26pm
post #4 of 369
Thread Starter 
Quote:
Originally Posted by Icemint View Post

Quote:
Phase Control:
-Optimized-Asus recomends this phase for offset mode ,i can use this phase for all my offsets no problem
1. I have to use Extreme or I get sudden black screens or random boots (even after 8 hours of prime95 stable). Sounds weird but Extreme also lowers temperature by 2-3 degrees (celsius).
2. I'm watercooling and T-probe works for me. I just decide to use it from the start, because Asus says its designed for watercooling to keep regulators not to get burned.
what the heck, maybe I just post 5GHz settings I'm using:
BLCK: 100.0
Multi 50x
PLL: Auto
VRM: 350
LLC: Ultra High
Phase Control: Extreme
Duty Control: T-probe
CPU Current: 140%
CPU spread spectrum: Enabled
CPU Voltage: 1.425 (this actually gives 1.425V-1.432V under load)
with offset use:
CPU Voltage
mode sign +
0.040 (it gets me exactly same voltage as putting it manually to 1.425)
everything else exactly the same as manual. Idle voltage drops to 1.040 or so @ 1600MHz. This chip is capable of 0.80 vcore at 1600Mhz, but I think thats impossible to get on current bios?.
almost forgot; All CPU settings ENABLED except:
Virtualization
Limit Maximum

T-probe works for me as well ( i also use H20 )but since majority are still on AIR or prefer AIR- Extreme will suite most ,looks like you have a pretty nice chip..i used to run P95 for hours @ 1.460v (if i remember correctly) and Linx stable and need it 1.490v for x51 but since i start using costume P95 1344/1792 FFT's things have change biggrin.gif (that test will give the run for your money) Old x51 linx run (Click to show)
51xlinx.jpg
Here is something about CPU spread spectrum ;
"CPU Spread Spectrum: Modulates the processor clock to reduce radiated noise emissions. Disable if overclocking, as clock modulation will increase instability."
source:
http://rog.asus.com/forum/showthread.php?2787-Maximus-IV-GENE-Z-BIOS-Guide-Overclocking

Thank you for Participating! thumb.gif
Edited by coolhandluke41 - 2/23/12 at 10:33am
    
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post #5 of 369
Cheers, thanks to you for intresting topic. smile.gif

I completely forgot: I slightly adjust VCCIO higher. Cant remember where it was, but now it's at 1.100V. I added it to my previous post. Didn't have to use it until past 4800MHz (I think it helps memory overclocking too, because I could adjust VDIMM a little lower)

And thanks for the tip to not use spread spectrum. I didn't really test spread spectrum when overclocking. I always let that disabled when oc'ing in the past (E6300&Q6600), but read some forum posts and there it was used (although many have left it to auto). I posted my 12 hour prime95 run at 5GHz, luckily it didn't hurt even spread spectrum was enabled. I actually haven't tried anything more. Temps are under 70C degrees on prime95, so I decided to left the cpu at 5GHz and keep it there for everyday use (mainly gaming/music/movies). And using offset mode really helps saving the cpu and motherboard. I'm smiling right now when the cpu is idling and temps are about 30C (asus probe says 22C!). biggrin.gif Just played some Civ5 and temps were under 50C.

ps. just tested your prime95 settings and I could verify, when phase control is set to optimize, I got a blue screen on about 15minutes. Great test I must say -didn't have to wait 3 to 8 hours! Now I'm running it phase control set to Extreme and its been running two hours without problems. btw, my "stress testing" is sometimes pretty extreme, because at the same time I'm using my comp normally. I sometimes also loop 3dmark06 demo at the same time when priming, just to see everything works at max stress (demonstrating heat of the summer, for example).
post #6 of 369
Thread Starter 
The main goal of this thread is to demonstrate that there is no clear formula for overclocking SB , especially with offset mode which is little tricky and a lot of fun ,if this thread will gain some popularity i will dedicate the second portion of the OP to show different offset settings for stable clocks above x47 provided by participants to help others with this great future
Cheers smile.gif
    
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post #7 of 369
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post #8 of 369
My 45x Bios settings 8hrs prime Custom Blend 15000ram used 8k-4096k range


Ai Tweaker
Ai Overclock Tuner:Manual
Turbo Ratio:
By Per/All Cores:45
PLL Overvoltage: Disabled

Additional Turbo Voltage:

Ai Tweaker (in the DIGI+ VRM section)
Load-Line Calibration:Medium
VRM Frequency:Auto
VRM Fixed Frequency Mode: Disabled
Phase Control:Optimized
Duty Control:Temp probe
CPU Current Capability:100
CPU Voltage:Offset +0.005
DRAM Voltage:1.5v
VCCSA Voltage:0.9v
VCCIO Voltage:1.00v
CPU PLL Voltage:1.5v
PCH Voltage:0.9v
CPU Spread Spectrum: Disabled

Advanced\ CPU Configuration >
CPU Ratio:Auto
Limit CPUID Maximum: Disabled
Execute Disable Bit:Enabled
Enhanced Intel SpeedStep Technology:Enabled
Turbo Mode:Enabled
C1E:Enabled
C3 Report:Enabled
C6 Report:Enabled

tempsvcore.jpg
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post #9 of 369
Great Read, this will be helpful in bringing down temps more... Thanks
 
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post #10 of 369
Thread Starter 
Quote:
Originally Posted by Rutjoani View Post

My 45x Bios settings 8hrs prime Custom Blend 15000ram used 8k-4096k range
Ai Tweaker
Ai Overclock Tuner:Manual
Turbo Ratio:
By Per/All Cores:45
PLL Overvoltage: Disabled
Additional Turbo Voltage:
Ai Tweaker (in the DIGI+ VRM section)
Load-Line Calibration:Medium
VRM Frequency:Auto
VRM Fixed Frequency Mode: Disabled
Phase Control:Optimized
Duty Control:Temp probe
CPU Current Capability:100
CPU Voltage:Offset +0.005
DRAM Voltage:1.5v
VCCSA Voltage:0.9v
VCCIO Voltage:1.00v
CPU PLL Voltage:1.5v
PCH Voltage:0.9v
CPU Spread Spectrum: Disabled
Advanced\ CPU Configuration >
CPU Ratio:Auto
Limit CPUID Maximum: Disabled
Execute Disable Bit:Enabled
Enhanced Intel SpeedStep Technology:Enabled
Turbo Mode:Enabled
C1E:Enabled
C3 Report:Enabled
C6 Report:Enabled

Looks good ,thanks for sharing thumb.gif
P.S. i noticed =>CPU PLL Voltage:1.5v
i assume you trying to get your temps down
Edited by coolhandluke41 - 3/13/12 at 1:52am
    
CPUMotherboardGraphicsRAM
i7 4930K Rampage IV Gene SLI Evga GTX 780 Classy 16Gb TeamX2400c9 
Hard DriveCoolingOSMonitor
Samsung 840 Pro/ Hitachi Deskstar 1TB  H20 (NexXxoS 420+280) w7x64 VG248QE 
KeyboardPowerMouseAudio
Logitech G110 SuperNOVA 1300 G2 G502 Proteus Core Foobar2K/WASAPI >NuForce Icon HDP >Crack with S... 
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CPUMotherboardGraphicsRAM
i7 4930K Rampage IV Gene SLI Evga GTX 780 Classy 16Gb TeamX2400c9 
Hard DriveCoolingOSMonitor
Samsung 840 Pro/ Hitachi Deskstar 1TB  H20 (NexXxoS 420+280) w7x64 VG248QE 
KeyboardPowerMouseAudio
Logitech G110 SuperNOVA 1300 G2 G502 Proteus Core Foobar2K/WASAPI >NuForce Icon HDP >Crack with S... 
  hide details  
Reply
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