2500k Overclocking question (power saving)

[kaihonsou]

Hello,

I just put together my new 2500k with P8Z68-V, everything is running nice and cool and no problems so far (hard drive is super slow but Im working on that).

The new bios is insane and is making a mild OC slightly intimidating. I am trying to find OC guides (for which there are plenty) but considering so many options designed for system stability its not easy!

The plan is to get 4.5ghz. Can I ignore everything else in he bios and just increase the BCLK to 45x and the Vcore to 1.2500? If this overclock work would I still have all the stiffy power saving options working as well?

This system is to last me a about 4 years, so the powersaving and stability options are important to me, and im willing to settle for a mild overclock if it meant a longer life for the motherboard.

If anyone knows a suitable guide for this as well let me know

Honsou.

 

[rbk123]

Yes and no. BCLK is all you need (although I'd recommend starting around 40 and going up after confirming stability). 1.25V is most likely not going to work for 4.5. My 2500k needs 1.375 to be stable at 4.5. The power saving options will still be there as long as C1E/EIST are left as is. Note there are 2 ways your MB will let you change the voltage - straight hard set to whatever it is you want and an offset. The offset will add whatever fractional voltage you set it to (i.e. .125 to make your 1.25 turn into 1.375) on demand.

I hope you have an aftermarket cooler.

 

[kaihonsou]

Thanks for the quick reply.

Im using a Noctua NH-U12P SE in a HAF 932.

I would actually settle for 4.0ghz, kinda forgetting how much im gaining from stock speeds (if its stable). Sandy Bridge makes overclocking so easy im taking it for granted.

I think the apprehension is that you have a few more options then just vcore to worry about. Will post back in a few days and see what I can get.

Is the life of the system dictated by the heat or how much voltage is going through it? Or both?

Honsou.

 

[kaihonsou]

Running Prime95 now @ 4.5Ghz, voltage at 1.275.

After manually setting the voltage to 1.275, the voltage no longer dips down to 1.0 when the clock speed goes to 1.6Ghz. I take it the energy saving and/or prolonging the life of the board aspect makes no difference if the voltage stays the same regardless of the clock speed?

Honsou.

Update: Got a error on prime95 after 1 hour of Large FFT testing on he 4th core. Going to retest at 4.4Ghz.

 

[MisterMac]

Running Prime95 now @ 4.5Ghz, voltage at 1.275.

After manually setting the voltage to 1.275, the voltage no longer dips down to 1.0 when the clock speed goes to 1.6Ghz. I take it the energy saving and/or prolonging the life of the board aspect makes no difference if the voltage stays the same regardless of the clock speed?

Honsou.

Update: Got a error on prime95 after 1 hour of Large FFT testing on he 4th core. Going to retest at 4.4Ghz.

Too little voltage, way to little.
googling any guide and how people OC on 2500k should tell you that.






Enable Load Line Calibration (Start with HIGH, i have the same board) and set Phase Control to EXTREME.

Set voltage offset mode and try hit around 1.30 - run prime.


I need 1.33 for 4,7 ghz, stable.


so try around 1.3+ for 4.5

EDIT:
With a shitty CoolerMaster elite 310 case + push/pull Antec 620 and a extra 120 mm intake on side.

I hit 69-72 C on my highest core others up to 5 C lower.

Tweak around, a bit, invest some time, you'll end up saving alot vCore and in that process, lesser temps.

 

[kaihonsou]

Too little voltage, way to little.
googling any guide and how people OC on 2500k should tell you that.






Enable Load Line Calibration (Start with HIGH, i have the same board) and set Phase Control to EXTREME.

Set voltage offset mode and try hit around 1.30 - run prime.


I need 1.33 for 4,7 ghz, stable.


so try around 1.3+ for 4.5

EDIT:
With a shitty CoolerMaster elite 310 case + push/pull Antec 620 and a extra 120 mm intake on side.

I hit 69-72 C on my highest core others up to 5 C lower.

Tweak around, a bit, invest some time, you'll end up saving alot vCore and in that process, lesser temps.

Running Prime95 after bumping the voltage to 1.3v, Large FFT is fine after 1 hour, running the small FFT now, max temp is 63 degrees celsius.

I have both of those settings on auto I believe, thanks for the tip If im stable as I am with them on auto, would enabling them prolong the life of my cpu and board or just increase stability?

Also, does your voltage stay the same regardless of the clock at idle or load?

Honsou.

 

[Crap Daddy]

I would recommend the easy way and it's amore than enough for everything you do apart from the benching virus. Just set the multi at 42 and leave everything else on auto. You'll have 4.2GHz the max turbo freq. It should work rock stable.

 

[kaihonsou]

I would recommend the easy way and it's amore than enough for everything you do apart from the benching virus. Just set the multi at 42 and leave everything else on auto. You'll have 4.2GHz the max turbo freq. It should work rock stable.

Never intended to go for 4.5Ghz, set the multi to 45 and put some of the voltage up on vcore and pll and it booted, Prime95 and it was stable for an hour till it got a minor error.

Still running Prim95 with the 1.3v. Once its ran for an hour its set. I only play and stream games

Just read that you can use the offset cpu voltage option instead of manually setting it to whatever and it will remain stable with the added benefit of longevity of the board. Can anyone clarify on this?

Honsou.

 

[kaihonsou]

Offset voltage was running at 1.4v (temps were going up to 70C!). I set the offset voltage to -0.060, and now the voltage is at 1.288v, which is where its just only unstable and fails at prime95 after so long.

Will the offset voltage always be random like this? Unless im terrible at math

Honsou.

System is stable, loads at 1.3v and idles at 0.944v. Extremely happy with that Thanks to everyone for all the advice!