i7-4790k and asus z97-a motherboard voltages and c-states

[radeon15]

Hi guys, I have a question about my asus z97-a motherboard and intel i7-4790k cpu. Whenever I set adaptive voltage to a max of 1.2v in the bios setting "additional turbo max voltage" and I check hwinfo or hwid monitor for my volts the cpu instead is running at 1.283v. It automatically seems to override any input I put in. Does anyone have an idea why this is happening? I then decided to run offset voltage and since my cpu seems to go as high as 1.283v i put offset voltage as -.083 to test if it would stay at 1.2v. It does and with c-state enabled it drops to 0.6v when idle. However then I noticed in hwmonitor that a voltage called “IA Offset” is set at 1.963v. What is IA offset voltage and is this potentially damaging?? Also I've tried to use the manual voltage and set it at 1.2v which works fine, however the voltage wont drop when the cpu is idle even with c-state 6 enabled. My power supply is evga g2 750w which supports c6/c7 for haswell. Does the manual voltage setting override even c-state, because from what I know it should be allowing the cpu to lower voltage when to idling. Intel speedstep is working fine and lowering frequency. Let me know what you guys think. Thanks.

 

[RunLuke]

I have the same board and CPU, I have mine overclocked to 4.8Ghz (offset, I think...), I'm not sure how to help you, but I'll look at my stats and see what's what if you let me know where to find it in HWINFO (I don't use it very much!).

 

[radeon15]

Yea that would be great! I'm not sure in hw info, but if you could download "cpuid hw monitor" and just let me know the values you get for "IA offset" voltage. Also what bios are you using and what are your settings in the bios for the overclock?

 

[RunLuke]

roger that! Will send you pics, gimme a moment.

IA Offset: 00.48V

Pictures coming up

 

[RunLuke]

BIOS version 2012

Sorry about the crappy photos, but it was the easiest way to do it.

[iimg]http://i.imgur.com/dQZc8id.jpg[/img]

 

[radeon15]

Thanks for the quick replies man but even when I set adaptive it still rises to 1.283v for a 4.5ghz overclock which is too high. When I manually stress test its stable at 1.195v. And then when I use offset voltage it adjusts the IA offset to 1.963v for w/e reason. From your pictures your IA offset voltage just stays at the amount you put in for the adaptive. How much do you think the cpu lifespan would be affected if i just left it at a manual voltage of 1.2v?

 

[RunLuke]

I don't dare answer that. I simply do not know.

 

[radeon15]

No worries man, I ended up figuring everything out. Thanks

 

[RunLuke]

Glad you did

 

[mbze430]

No worries man, I ended up figuring everything out. Thanks

Did you find out what setting in the BIOS that cause the IA Offset? mine reads out v2.0 I can't figure out which setting affects IA Offset.

 

[vinnyj166]

No worries man, I ended up figuring everything out. Thanks

Hey man, I wanted to reply to you because I am having the exact same issue as you (but with a z87-pro). Manual voltage works fine in the bios, but when I switch to adaptive, no matter what I enter into the "additional turbo voltage field", the cpu gets fed exactly 1.283v at load. I've tried every potential solution in every other forum on the topic (this apparently has happened to a lot of people). The closest solution I found was to enter an aggressive negative offset value, but that lowers both the peak AND idle voltages, which puts the system at risk of shutting down due to undervoltage at idle. So that's not ideal.

Anyway, you said you figured everything out. Would you mind sharing your solution?