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Did we ever come a conclusion on safe SB voltages? - Page 6

post #51 of 93
Quote:
Originally Posted by AtomicFrost View Post
Thank you for posting this guide about offset voltages TwoCables.
You're welcome!!


Quote:
Originally Posted by AtomicFrost View Post
For me personally I haven't tried using offset vcore for both reason 1 and 2. I am still trying to wrap my head around all of this new stuff, and my last build was on socket 775 so a lot of this stuff is new for me.

I have a quick question about offset voltages. When an overclock is stable with a manual voltage does that mean it will be stable with an offset voltage that has the vcore rise to the same voltage?
I'm not sure, but it was for me. I mean my stable voltage was hovering between 1.392V and 1.400V, so I set my Offset to achieve that under full-load and it has been stable ever since.


Quote:
Originally Posted by AtomicFrost View Post
I'm going to go play with offset voltage. I believe that I have 4.9Ghz stable with ~1.392 -~1.408. With my motherboard I have the manual vcore set to 1.385v + auto extra turbo voltage. It seems that the extra turbo voltage is a different type of vcore offset that works with manual vcore settings.

What do you think is better to use? A lower manual voltage with the extra turbo voltage option, or offset vcore? I'll have to do some more research on this.
I think an Offset would be better so that the voltage isn't at 1.392V-1.408V 24/7. That's really the only reason why I'm using an Offset.


Quote:
Originally Posted by CallsignVega View Post
Do all motherboards even have an off-set voltage adjustment? I cannot find one in my EUFI, only vcore options are auto and the manual voltage selections and low vdroop or disabled.
I don't think so. I just looked through the manual for your motherboard, and there is nothing that I can see that would allow for the voltage to dynamically adjust based on load. However, that doesn't mean there isn't a way to do it; I just don't know how it would be done in that UEFI.
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post #52 of 93
Two Cables

When I set my Vcore to Offset mode, it doesn't allow me to choose an original voltage (Just the Offset?) So my question is how do I know what amount to Offset to? I know I'm missing something here.

Settings are as follows

CPU Ratio Setting: Manual
Max Ratio: 48
Internal PLL Overvoltage: Disabled
Intel Speedstep: Enabled
Turbo Boost Power Limit: Manual
Short Duration Power Limit: 300
Long Duration Power Limit: 300
Additional Turbo Voltage: Auto
Core Current Limit: 250
Host Clock Override (BLCK): 100
Spread Spectrum: Disabled
Power Save Mode: Disabled
CPU Core Voltage: 1.410v
Load Line Calibration: Level 2
DRAM Voltage: 1.5v
PCH Voltage: 1.612v
CPU PLL Voltage: 1.709
VTT Voltage: 1.116
VCCSA Voltage 0.925

C3 and C6 states disabled
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post #53 of 93
Wow, i have a lot to learn about Intel overclocking, i will be switching from AMD 1090T to a i7 2700k and that should be in here wednesday. Amd seems so much easier than overclocking and AMD processor, but then again, i started overclocking with amd so it was something completely new to me and i wasnt stuck in my ways.
post #54 of 93
Quote:
Originally Posted by Heazy View Post
Two Cables

When I set my Vcore to Offset mode, it doesn't allow me to choose an original voltage (Just the Offset?) So my question is how do I know what amount to Offset to? I know I'm missing something here.

Settings are as follows

CPU Ratio Setting: Manual
Max Ratio: 48
Internal PLL Overvoltage: Disabled
Intel Speedstep: Enabled
Turbo Boost Power Limit: Manual
Short Duration Power Limit: 300
Long Duration Power Limit: 300
Additional Turbo Voltage: Auto
Core Current Limit: 250
Host Clock Override (BLCK): 100
Spread Spectrum: Disabled
Power Save Mode: Disabled
CPU Core Voltage: 1.410v
Load Line Calibration: Level 2
DRAM Voltage: 1.5v
PCH Voltage: 1.612v
CPU PLL Voltage: 1.709
VTT Voltage: 1.116
VCCSA Voltage 0.925

C3 and C6 states disabled
Oh, I am glad you asked about Offset mode. It's actually fairly easy to figure it out.

My first step is to set Load-Line Calibration to the 2nd highest setting for the smallest amount of vDroop possible while also avoiding vRise. This helps for what we will do next.

Look at this part of Real Temp (I recommend Real Temp 3.67):




Click that button if it's not showing your VID.

If you get a very low number in comparison to mine here, then put some load on the CPU to see what your actual Voltage Identifier really is.

Now find the difference between the VID you get and the core voltage you want to see in CPU-Z while under full load, and then the Offset value you need to use is revealed. So what you do at this point is round up or down a little bit to see which Offset achieves the exact voltage you want (experimentation will be necessary).

For example: my VID flip-flops between 1.3561V and 1.3611V. The core voltage I wanted was a flip-flop between 1.392V and 1.400V. So the difference between these 4 numbers (the two VIDs and the two voltages) is 0.0359/0.0309 and 0.0439/0.0389. My Offset ended up needing to be +0.040V to achieve the voltage I want, but someone else with an identical system may end up needing +0.035V or +0.045V.

So yeah, that's basically it.

If you lower the LLC to the 3rd highest setting, then the Offset will need to be adjusted a bit to compensate. If the LLC is raised to the highest setting possible, then of course the Offset will need to be adjusted the other way.
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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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post #55 of 93
Quote:
Originally Posted by TwoCables View Post
Oh, I am glad you asked about Offset mode. It's actually fairly easy to figure it out.

My first step is to set Load-Line Calibration to the 2nd highest setting for the smallest amount of vDroop possible while also avoiding vRise. This helps for what we will do next.

Look at this part of Real Temp (I recommend Real Temp 3.67):




Click that button if it's not showing your VID.

If you get a very low number in comparison to mine here, then put some load on the CPU to see what your actual Voltage Identifier really is.

Now find the difference between the VID you get and the core voltage you want to see in CPU-Z while under full load, and then the Offset value you need to use is revealed. So what you do at this point is round up or down a little bit to see which Offset achieves the exact voltage you want (experimentation will be necessary).

For example: my VID flip-flops between 1.3561V and 1.3611V. The core voltage I wanted was a flip-flop between 1.392V and 1.400V. So the difference between these 4 numbers (the two VIDs and the two voltages) is 0.0359/0.0309 and 0.0439/0.0389. My Offset ended up needing to be +0.040V to achieve the voltage I want, but someone else with an identical system may end up needing +0.035V or +0.045V.

So yeah, that's basically it.

If you lower the LLC to the 3rd highest setting, then the Offset will need to be adjusted a bit to compensate. If the LLC is raised to the highest setting possible, then of course the Offset will need to be adjusted the other way.
Nice, TYVM. I will try this out. You are the man!

Edit: Whoa... our VID's are identical... is that normal?
Edited by Heazy - 10/31/11 at 8:36am
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post #56 of 93
Quote:
Originally Posted by Heazy View Post
Nice, TYVM. I will try this out. You are the man!

Edit: Whoa... our VID's are identical... is that normal?
You're welcome!!

Yeah, it's normal. I mean it's not like it's a million to one chance or anything.
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post #57 of 93
Quote:
Originally Posted by Nick2253 View Post
Forgive me if there are other posts like this. I tried searching, but I kept finding page after page of results from Jan-Feb where people were just speculating.

Having read the Intel data sheet, I know, for a fact, that the max VID for SB is 1.52V.

I've also seen the other numbers, like 1.38, or 1.4, or everything, and I have seen absolutely no proof that they are the case.

I've also read the list in the Sandy Stable club, and the voltage comment there.

My question: have we seen any degradation due to voltages at or under 1.52V with SB in the 10 months or so since it was released?

My goal is to run my 2600k at 5GHz with around 1.45V on water (I'm currently Priming right now to see if its stable). I just want to see if anyone has had any personal experience with voltages at this level.
Everyone seems to forget that Intel allows for Vdroop in their voltage specification. Intel's max VID of 1.52V is assumed with LLC disabled. If you set your voltage to 1.52V in the BIOS and make sure LLC is disabled, you'll find yourself with a load voltage of around ~1.4V. On my ASUS board, turning LLC to ultra high and manually setting the voltage to 1.4V achieves the same results. Offset voltage is another story.


Sorry if I misused any terms, as I'm by no means an expert.
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post #58 of 93
1.52 to 1.4 without LLC? I don't think the vdrop is that dramatic.
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post #59 of 93
Quote:
Originally Posted by JedixJarf View Post
1.52 to 1.4 without LLC? I don't think the vdrop is that dramatic.
It's been that way on several boards and chips for me. Typically, the higher you go, the more vdrop there is. Try it for yourself and see.
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post #60 of 93
It's not just after vDrop. It's after both vDrop (idle) and vDroop (full load).
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It's a computer!
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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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