Basic OC help w/ ivy

[davel]

So I started to mess around with learning how to OC

So far only thing I have done is change the CPU Clock ratio (multiplier)to 43.

I had two questions:

1) Right now my vcore is set to auto, how does one know when you need to manually set it? Also what does increasing vcore actually do? Give it more power? I keep reading about people saying vcore and not to go over 1.5 but not sure why.



2) I have the Intel Turbo boost still on default which is enabled. Should I disable all Intel Turbo boost when overclocking and if so why?

 

[SpeedTester]

Don't attempt to go to 1.5v on your ivy. That was rule of thumb for sandy. I wish I could give you more info but I don't have an ivy just a 2600k. Im sure the guys will chime in soon thou.

 

[Ferzerp]

Somewhere between 1.25 and 1.3V you'll hit a point where you can't get the heat off it fast enough before it throttles due to hitting 105C.

 

[nyker96]

like good people says, don't go over 1,3 for Ivy or you will see a burnt out hole where your cpu used to be ;]

 

[blastingcap]

Also, read this thread first if you are thinking about overvolting: http://forums.anandtech.com/showthread.php?t=2243736

 

[SickBeast]

OP you should be able to just set your multiplier to 40 and run at 4ghz on stock volts. A minor bump will get you to 4.5ghz. From there you will hit a heat wall and it becomes pointless.

 

[davel]

Ok so doing some more reading this is how I think I understand vcore.

Vcore is how much power you are giving to the cpu, and as you go up in OC you need to give it more power to get stability. The more vcore you give it the higher the temp gets. But if you give it too much vcore that can damage or degrade the chip.

Is that correct?

So my next question is should I just leave it at auto? and not mess with it at all? From what I understand it better not to leave it on auto because mobo is not smart enough and will give it more vcore then you need is that correct? I notice using auto @ stock setttings it goes up to 1.2v

 

[Ferzerp]

Correct. Auto-adjusted voltage (if that's the auto you mean), typically supplies more than the minimum needed. You always want the minimum voltage necessary for 100% stability for your config.

 

[SickBeast]

1.2v and even 1.3v are fine and they should get you to 4.5ghz easily. You might even do it on stock volts.

 

[Endymion FRS]

I have a similar question, how to I keep it locked at stock on an Asrock Extreme4 Z77? I don't see any option, and setting the multiplier to 42 makes the board auto adjust voltage to 1.275

 

[davel]

Thanks guys!

So my next question is if you want to adjust it manually how do you know what number to start off?

For example I am at 4.3 and I seen it go as high as 1.212v with it at auto when I am stressing the cpu. Should I start at 1.2v and work my way down?

What would be a good starting point and how exactly would I know when it stable? run prime95 for a few hours?

 

[SickBeast]

I would start at 1.25v at 4.5ghz and slowly work my way down with the voltage. My guess is you will settle at 1.2v. Make sure you watch your temps!

 

[davel]

Ok thanks!

Last question there is an advanced option in my BIOS under CPU frequency settings.

In there you can disable Turbo Boost. Is there any point of having Turbo Boost if you are OC since I am going past 3.8?

Should i disable it or keep it on?

 

[SickBeast]

Keep turbo boost on. You're actually altering the max turbo frequency. Turbo is simply your top clock speed; when you are at 100% load you will be at 4.5 if you set it properly. It's what you want.

 

[LagunaX]

You can drop your PLL to 1.6 too.

 

[davel]

Great thanks!

What program do you use to run and test for stability and how long until you know can increment to the next voltage down.

For some reason I cannot find a copy of prime95 26 64 bit anywhere, their website is down

 

[SickBeast]

You might as well just use LinX. Use the default settings and if it passes then back down the voltage a bit. It should take 5-10 minutes per run.

Prime is better once you've narrowed it down a bit more. Use the "blend" torture test overnight.

Oh, and *watch* your *temps*. Those chips get *hot* at 4.5ghz!

 

[SickBeast]

Ivy Bridge at 4.5ghz with poor cooling:

 

[SickBeast]

Water cooling to help you reach 5ghz:

 

[SickBeast]

In case you need moar voltage:

 

[QuantumPion]

I would not leave your CPU voltage on auto. Auto generally sets it to a really high value for stability without regard to temps. On my board, when I set the clock speed to 4.5 Ghz with CPU voltage on auto, the motherboard set it to 1.375 V which is way way way too high. Right now I'm running with the voltage offset set to +0.040 which gives the CPU ~1.21 V at full load.

 

[SickBeast]

Yes, offset voltage is the best.

 

[davel]

You might as well just use LinX. Use the default settings and if it passes then back down the voltage a bit. It should take 5-10 minutes per run.

Prime is better once you've narrowed it down a bit more. Use the "blend" torture test overnight.

Oh, and *watch* your *temps*. Those chips get *hot* at 4.5ghz!

Is LinX like the Intel burn test? I used that Intel burn test and it pushed my temps to 80, but then I ran BF3 and my temps only went to 64

 

[SickBeast]

Is LinX like the Intel burn test? I used that Intel burn test and it pushed my temps to 80, but then I ran BF3 and my temps only went to 64

Yep they are the same thing. Watch those temps. Ivy can bring the heat!

 

[davel]

Yep they are the same thing. Watch those temps. Ivy can bring the heat!

But Linx cant be used to measure temps since doing real gaming which is what I ues PC for will never hit the same temps?

So even though Linx might push 90 I will still be safe in theory?

What temps would you recommend to never go above @ full load for everyday gaming?