Adaptive Voltage

[crazymilk]

I have my Haswell 4670K overclocked to 4.4Ghz on my ROG Impact Mobo with Voltage set to 1.25v manual, it is rock solid and have passed AIDe64 for 24 hours and IBT.

I was under the impression that manual voltage is required to dial in the sweet spot/stress test the CPU. Once happy you should revert the voltage setting to Adaptive so make use of the power saving feature when the CPU is idle. However as soon as I set the voltage to Adaptive it won’t boot.


Any help would be great, I am not that bothered about keeping on manual but it would be nice to use the adaptive feature if possible.

Thanks

[Arne_Saknussemm]

Hi crazymilk 🙂

Couple of questions. What Vcore does CPUz show when you are running AIDA with manual set to 1.25. And..what value are you setting for Adaptive voltage? you have to enter a value for the adaptive voltage offset right? and a bit of trial and error to get back to the same load voltage that you see in CPUz...

[crazymilk]

Hi m8
Thanks for the reply.
I will check when I get home to see what vcore is in AIDA.

Do you have so set a value on the adaptaive voltage? :confused: I just selected adaptive and everything on Auto???

[HiVizMan]

Yeah you do need to set a base voltage that is correct.

[Arne_Saknussemm]

Yes you have to set a value otherwise the voltage is just auto voltage and usually wont set anything like what you are aiming for.

The idea is to find your stable manual voltage...check in CPUz what voltage you are running at load and then find an adaptive voltage that gives you this same load voltage. Usually means a couple of tries with different values....Not sure what the minimum allowed value is but try something like +0.005 and -0.005 to start with and see which direction you need to go...

[VeerK]

Hey guys, my question is related to OPs. When I set Adaptive voltage that is fine tuned under manual, the voltage doesn't drop. I run 1.248v for manual and when I set 1.248v for adaptive, the voltage never drops. Someone said to enable C states and then adaptive works fine with voltage dropping to .144v idle and then ramps up and changes according to load and then hits 1.248v under full load, like it should. My question is, why do I have to enable C states to get adaptive to drop the idle voltage. I know that when I use manual and activate c states my voltage and frequency drops to 800mhz and .144v, so is adaptive only special in that it keeps your frequency at overclocked levels while dropping the voltage? Also, I have noticed that voltage jumps alot and I don't know if that is safe for the cpu. The problem is Rajas guide doesn't cover Adaptive very well in terms of c states. Can anyone who uses c states please advise?

[Arne_Saknussemm]

Hi VeerK :)....that sounds like enough stuff for your own thread 😉

Speedstep is what you need enabled and C1E acts to do the same thing. C1E is power saving by CPU EIST from OS and is affected by your power plan so make sure if you set performance power plan you set minimum processor state to 10%.

Manual voltage will mean the voltage does not drop to the CPU even though the multi might drop due to power saving. With EIST and C1E enabled you will get multi and voltage dropping and raising together.

[VeerK]

So sorry, didn't mean to threadjack, I was worried creating another thread only for adaptive question might make the community angry. Thank you for your reply, I will change appropriately.

[HiVizMan]

VeerK wrote:
So sorry, didn't mean to threadjack, I was worried creating another thread only for adaptive question might make the community angry. Thank you for your reply, I will change appropriately.

My friend this ROG community is not like any of the other web sites, here you will never get shouted at or punished for asking question. You are always welcome to start your own thread about anything. We know how rubbish the search function can be on forums and anyway each user has a unique hardware set up so one fix may not suite all. Ask your questions without hesitations.

Take care now.

[crazymilk]

Thanks for the replies guys

I shall play around with the adaptaive voltage.