overclocking i5/i7

[whitedragon101]

(feel free to correct anything incorrect)

 

 

 

From what I can gather all the multipliers people are changing on their overlooking guides are for the CPU boost clock.  So the CPU frequency will still drop down when the performance is not needed.  e.g 2.0ghz idle 4.6ghz turbo 

 

If that is correct, then what about the voltage?  If you set a core voltage of 1.25v or even 1.3v does that drop down and change as needed or is that fixed no matter what ?

[MegaDave91]

That is what adaptive voltage is for; it adjusts the voltage based on cpu load.

[Guest]

Yes it does. At least if you use adaptive voltage. Your modern Haswell CPU will go all the way down to 800MHz at 0.7V. From my experience you need to use a bit more voltage if you OC with adaptive voltage, but it's worth it in the end.

[Aniallation]

If that is correct, then what about the voltage?  If you set a core voltage of 1.25v or even 1.3v does that drop down and change as needed or is that fixed no matter what ?

Yep, if core clock drops then voltage also drops.

[Pomfinator]

Just make sure you don't put manual voltage, or else the CPU will run at the specified voltage at all times.  And it's not exactly a "boost clock" multiplier, I think you're confusing boost clock with something like Speedstep.

[Cheddle]

(feel free to correct anything incorrect)

 

 

 

From what I can gather all the multipliers people are changing on their overlooking guides are for the CPU boost clock.  So the CPU frequency will still drop down when the performance is not needed.  e.g 2.0ghz idle 4.6ghz turbo 

 

If that is correct, then what about the voltage?  If you set a core voltage of 1.25v or even 1.3v does that drop down and change as needed or is that fixed no matter what ?

 

http://www.hardwaresecrets.com/article/Everything-You-Need-to-Know-About-the-CPU-C-States-Power-Saving-Modes/611

 

your really adjusting the "maximum" voltage. 

 

Some claim disabling C-states (as in locking the voltage at its max constantly) will provide a higher and more stable overclock. Though I got 4.8Ghz on my g3258 with C-states on.. sooo... yeah...

[OCing Noob]

Just make sure you don't put manual voltage, or else the CPU will run at the specified voltage at all times.  And it's not exactly a "boost clock" multiplier, I think you're confusing boost clock with something like Speedstep.

in case of devil's Canyon i kind a disagree . coz i'm using manual voltage my cpu is on 4.5 at 1.25v i'm not using adaptive control and on idle cpu goes down to 700mhz with 0.821V . only you need to leave . intel speed step enable  and rest is on the mobo

[whitedragon101]

Just make sure you don't put manual voltage, or else the CPU will run at the specified voltage at all times.  And it's not exactly a "boost clock" multiplier, I think you're confusing boost clock with something like Speedstep.

 

I'll start with how I think it works and you can fill in the mistakes if I make them :

 

I thought - A 4690k runs at 3.4GHz so you get that speed guaranteed.  Then depending on thermal constraints (how good your cooling is) the chip can turbo up to its rated turbo speed of 3.9GHz.  Modern overlocking adjusts the multiplier for the max turbo boost speed so it can turbo to say 4.4GHz, but only runs at that speed when needed then drops down to the rated 3.4GHz or lower depending on load.

[harrynowl]

I'll start with how I think it works and you can fill in the mistakes if I make them :

 

I thought - A 4690k runs at 3.4GHz so you get that speed guaranteed.  Then depending on thermal constraints (how good your cooling is) the chip can turbo up to its rated turbo speed of 3.9GHz.  Modern overlocking adjusts the multiplier for the max turbo boost speed so it can turbo to say 4.4GHz, but only runs at that speed when needed then drops down to the rated 3.4GHz or lower depending on load.

That's effectively how it works with adaptive voltage.

 

When I'm using it my CPU runs @ 4.7GHz/1.315v (specified as boost voltage by me in the uefi), then when not needed it can sit at 3.5ghz/0.98v (stock vcore), and if it's totally idle it sits at ~1ghz 0.7v