Is this a correct voltage for my 2600K?

[Yozer34]

On my 2600K, I have my Vcore set at auto and my multiplier set to 43. When I open CPU-Z it tells me my Vcore is at 1.336v.
Is this a fine voltage (considering it is at auto) for 4.3GHz? If not, how could I change the voltage manually (to what value)?

http://i626.photobucket.com/albums/tt344/Yozer245/CPU.png

 

[HostileDonut]

Auto tends to overvolt. Most will hit 4.3Ghz with 1.2x volts when set manually. Set the offset to (-).05 volts and then stress test the CPU a little. If it passes, try .10, and so on until it passes. If (-).05 doesn't work, try (+).05v.

 

[Yozer34]

Auto tends to overvolt. Most will hit 4.3Ghz with 1.2x volts when set manually. Set the offset to (-).05 volts and then stress test the CPU a little. If it passes, try .10, and so on until it passes. If (-).05 doesn't work, try (+).05v.

Wait.. I don't know what you mean by + .05v and -.05v !! XD
What's the offset? Is it the Vcore?
And by (-).05v, do you mean 1.336 - 0.05v = 1.286v? So just change the CPU voltage to manual and 1.286 instead of AUTO?
Could you please be more clear and list steps? Thanks! (i'm a noobie, a little)

 

[HostileDonut]

No problem! Go into the BIOS and go to the CPU settings section. Then find the Vcore and change it to "offset" mode. Offset will open a section where you pick your setting of voltage. It can go down to a low voltage when your CPU is idling, but shoot up to a point that you set it to when it need the power. There are - and + settings. Find the -.005v first and try that. I meant to say .005 earlier. Anyway that should set you to be somewhere around 1.3v when under full load with load-line calibration on.

 

[Yozer34]

What else should I change besides disabling SpeedStep and enabling Load-line calibration?

And... is "CPU Voltage" the same as Vcore?

 

[cuecuemore]

You can potentially disable various C-states to enhance stability. If it just says "CPU Voltage" then that is the same as Vcore.

 

[HostileDonut]

What else should I change besides disabling SpeedStep and enabling Load-line calibration?

And... is "CPU Voltage" the same as Vcore?

There are multiple things. Here is a pretty good guide: http://www.tomshardware.com/forum/274821-29-sandy-bridge-series-overclocking-cores-guide

Vcore is CPU voltage.

 

[Yozer34]

Okay, well back to the offset thing.

I checked my settings in the bios and Vcore (CPU voltage) is at 1.288v offset mode.
Under it, there's a + sign set. Should I change this to - ? And offset voltage to 0.005 instead of Auto?

Here's the pic:
http://i626.photobucket.com/albums/tt344/Yozer245/photo.jpg

Anyway, Can't I just set the CPU Voltage to manual mode and maybe start off with 1.288 (manually).. instead of all this offsets?

 

[bearclaw99]

Which motherboard do you have? My ASRock board seems to give me a lot more luck with offset voltage as well. If you have a halfway decent 2600K, you should be able to do 4.3-4.4 around stock

 

[cuecuemore]

Which motherboard do you have? My ASRock board seems to give me a lot more luck with offset voltage as well. If you have a halfway decent 2600K, you should be able to do 4.3-4.4 around stock

That would be a beyond golden chip, a halfway decent one might make it to 4.0.

 

[Energy96]

I run mine at 4.3 with everything set to stock/auto. I must have gotten lucky lol.

 

[HostileDonut]

Okay, well back to the offset thing.

I checked my settings in the bios and Vcore (CPU voltage) is at 1.288v offset mode.
Under it, there's a + sign set. Should I change this to - ? And offset voltage to 0.005 instead of Auto?

Here's the pic:
http://i626.photobucket.com/albums/tt344/Yozer245/photo.jpg

Anyway, Can't I just set the CPU Voltage to manual mode and maybe start off with 1.288 (manually).. instead of all this offsets?

Yes, just change it to -.005 and that should put you under 1.3v the further - you go. The further = you go should put you above 1.3v. That is how my 2500k works. I would start in the - and go from there. Your overclock is pretty minor so I think you could do it below 1.3v. Good luck!

 

[bearclaw99]

That would be a beyond golden chip, a halfway decent one might make it to 4.0.

No, it's fairly common with SB actually. Mine will do 4.4 stable with 0.005v under stock

 

[HugoStiglitz]

My 24/7 Stable Clock is 4.5ghz @ 1.275 (i dont use offset)

Most chips will be 1.25 to 1.35 vcore @ 4.5ghz


and Energy96 run Prime95 and use CPUz to check ur vcore. if ur using AUTO then its very possible that its pumping closer to 1.5 volts

 

[Yozer34]

No, it's fairly common with SB actually. Mine will do 4.4 stable with 0.005v under stock

So you only changed the multiplier to 44 while leaving vcore on offset mode and -0.005? When I only change the multiplier to 43 with auto (aka offset) vcore, it says 1.288v in the bios and 1.336 in CPU-Z.
Could you please list the steps you did that got you to a stable 4.4ghz 0.005v under "stock" ? And what is that stock voltage value? Thanks!

 

[HostileDonut]

Offset is not auto! Just because his can do that doesn't mean yours can hit it like that. Mine can 4.5Ghz and it's hard for it to go further, where his can hit 4.4Ghz easily! Yours may have a harder time hitting the clock you want, you cannot just cookbook an overclock if you know what I am saying.

 

[Yozer34]

Offset is not auto! Just because his can do that doesn't mean yours can hit it like that. Mine can 4.5Ghz and it's hard for it to go further, where his can hit 4.4Ghz easily! Yours may have a harder time hitting the clock you want, you cannot just cookbook an overclock if you know what I am saying.

I understand.. I really want to know what MANUAL voltage to start overclocking with. I'm aiming at 4.4 - 4.5 max for that starting voltage. Could you please give me a start?

 

[HostileDonut]

They are all different, but I would try 1.28v first and move from there. It will most likely take about 1.3v +/- .023v.

 

[bearclaw99]

Yeah auto isn't offset. If you want to try my way, just start on offset -0.005 and go up from there if needed to become stable. +0.005, +0.010 etc

 

[Energy96]

and Energy96 run Prime95 and use CPUz to check ur vcore. if ur using AUTO then its very possible that its pumping closer to 1.5 volts

I checked again just to be certain that I read it right months ago and the highest v-core went running prime under auto setting was 1.3v which is still plenty low. I could prob manually try to get it lower but 1.3v should not harm the chip at all and I have never had a blue-screen.

 

[HostileDonut]

I checked again just to be certain that I read it right months ago and the highest v-core went running prime under auto setting was 1.3v which is still plenty low. I could prob manually try to get it lower but 1.3v should not harm the chip at all and I have never had a blue-screen.

Hah! Mine has wen higher using auto! Much higher... Like around 1.4v.

 

[Energy96]

Hah! Mine has wen higher using auto! Much higher... Like around 1.4v.

I'm sure it has a lot to do with what motherboard you have and how it's BIOS is programmed.

I also have my RAM running at 1800mhz through its XMP profile as well. All in all that's not too bad of an overclock IMO for basically doing nothing more than setting the multiplyer to 43.

 

[HostileDonut]

I'm sure it has a lot to do with what motherboard you have and how it's BIOS is programmed.

I also have my RAM running at 1800mhz through its XMP profile as well. All in all that's not too bad of an overclock IMO for basically doing nothing more than setting the multiplyer to 43.

Yeah, it isn't bad, just I think you could do better with offset or manual. I don't like manual/fixed because when the CPU idles it doesn't go down with it.

 

[Energy96]

Yeah, it isn't bad, just I think you could do better with offset or manual. I don't like manual/fixed because when the CPU idles it doesn't go down with it.

I wouldn't mind setting it better using offset, etc but I admit I am lazy when it comes to OC'ing and really haven't had a real need to improve it. I don't know what to set and where to set it so it would probably take a lot of reading for me to get right. I'm sure if I were going to push the OC higher I would need to figure this out but the processor is already faster even at stock than even necessary from what I see from my usage.

 

[Yozer34]

OKay so I've run a 10-hour stress test with offset -0.005 and it was perfectly stable. Should I change it now or leave it at -0.005?