• Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!

SOLVED Vcore won't drop when core speed drops

Overclockers is supported by our readers. When you click a link to make a purchase, we may earn a commission. Learn More.

Alaric

New Member
Joined
Dec 4, 2011
Location
Satan's Colon, US
I have a happy OC at 4.7 GHz and 1.411v (measured). Since I don't need that all the time, I enabled all the C states and EIST in the BIOS, then went in to the Windows Power Plan and dropped the minimum processor state to 2200 MHz, cooling policy is Active. No sleep or hibernation enabled. There's really no point in enabling all those things if the voltage stays that high. It's bad enough the fans ramp up to take off speed when I open a browser (4.7 GHz really shouldn't be necessary to check email), but one issue at a time. I could always let the mobo do its 4.6 GHz OC thing with everything on Auto, but that seems like a cheesy way to go about it. Setting the vcore to Auto results in crashing when it spools up to full speed. I'm open to suggestions as to what I've missed. I don't want to run 1.4v+ vcore 24/7 as it just seems like unnecessary wear and tear. It's bad enough I'm running my RAM like that. LOL

This is how on a Gigabyte GA-z170x Gaming 7 Rev. 1.0 Other Giga boards in the series should be similar, if not identical.
CPU clock ratio set to 47 under Advanced Frequency Settings, then the sub heading Advanced CPU Core Settings Clock Ratio to 47.
Under Advanced Voltage Settings set CPU Vcore to Normal. That makes Dynamic Vcore Voltage available. I added the difference between the base voltage (1.215v) and my OC voltage (1.420v), which was .205v on the Dynamic Vcore Voltage line. Hit Save and Exit. I was happy to see the offset only set a ceiling, not a hard go-to number. I could only get it stable at 1.420v vcore, the mobo seems to be able to do it at 1.392v. Thanks to Lochekey and "Take a picture" Earthdog. I'll add this info here http://www.overclockers.com/forums/showthread.php/788284-My-6700k-4-7-GHz-(so-far) If readers don't want to suffer through my learning to read my BIOS.

Thanks again, guys. :thup:
 
Last edited:
I had to use adaptive vcore to get mine to work.

- - - Updated - - -

Also try speed step and or speed shift settings for clock speed
 
What ks windows perforamnce plan set to? Need to be on balanced fkr drops...
 
Ahh, Balanced. So I need to go through and create another power plan. Figures. Oh well, I also have to figure out why my display is showing artifacts when I scroll now. Always something.
 
OK, it's set to Balanced and speed drops all the way to 8oo MHz. And voltage doesn't budge. It's still showing 1.416v vcore in HWMonitor. All of the power saving widgets in the BIOS are turned on. I don't have vcore set to Auto because it crashes, and I can't seem to find a way around that. I'll poke around in there some more tonight and figure out what to do then.
 
In the bios do you have the vcore set to manual/static or adaptive/offset? Not quite sure what language your particular board uses.

If you are hard keeping the exact voltage instead of keeping in an offset it may force that voltage all the time instead of stepping it down.
 
Ah ha! I don't have adaptive anywhere, but I may have offset. I'm not sure. It is set manually and I figured that would be the issue but I haven't been able to find anything other than Auto and Manual in the Advanced Voltage Settings Although, offset would be difficult without setting a minimum manually because vcore is all over the place depending on speed.

So, I'll type this out to make sure I have the process straight. I'll have to find the minimum stable vcore for the minimum core speed Winders drops to (800 MHz, I think) and set the voltage there, then set the offset to my minimum stable OC vcore (min. state + the difference=OC vcore). I'll poke around the BIOS and see if I can find offset voltage for the CPU. Intel's XTU has all that but I'd really rather do it in the BIOS.
 
No it is a little different. the MOBO will assign a "stock" voltage for under load. The offset will increase the voltage past that to allow for your overclock. So if your motherboard says "Stock" voltage is 1.2v and you want 1.4v your offset would be +0.20 volts. Make sure that it says +0.2 and not -0.2 volts. This is just an example so you will have to find what your MOBO "stock" voltage is.
 
That's the problem. It doesn't show a "stock" voltage. I can set it manually or on Auto. Auto means I have to in to the OS and take the number from software, check it at the board with a multi meter, then go from there. The hitch in that plan is the voltage is never stable in one spot on Auto. It changes constantly depending on how many windows are open, mouse movement, etc..

edit: I'll go into the BIOS and write down the options available now. I'm on the edge of guessing some stuff and that won't help at all.
 
I tried to look up your motherboard's manual but it does not show the voltage options menu so I cannot look up what any of the settings are called to reference them.
 
Yeah, the manual is a little light on useful stuff. LOL
Under Advanced Voltage Options I have the following:
CPU Vcore Auto/Normal/ or manually set a voltage
Dynamic Vcore Grayed out and nothing seems to make the option available
VCCIO
System Agent
CPU Core PLL Overvoltage (+mv) can be manually set or left blank. + and - keys go in increments of 15. No ., + or - showing. Just 15, 30, 45, etc. Different numbers can be keyed in manually.

Almost forgot. LLC is set on High.

Why not hit f12 and screenshot the bios to a usb stick...

That is a dandy idea. BRB.
 
OK, here it is.
BIOS.JPG

And, yes, I noticed my BIOS doesn't know what day it is. I'll fix that next time in there.

Just saw the vcore. BRB
 
If you set it to Nirmal and then Save and exit then go back into buoys does it then give you the option to adjust the dynamic voltage?
 
Well, that was "interesting". After toggling through the PLL options to see what was there, my vcore got stuck at 1.510v. So after several attempts to fix it I set the CPU back to Auto on everything, so it's at stock speeds now. Sheesh. Vcore drops as low as .156v now, and goes up to 1.224v (800 MHz to 4002 MHz)
Current BIOS
BIOS2.JPG

If you set it to Nirmal and then Save and exit then go back into buoys does it then give you the option to adjust the dynamic voltage?

Checking now. BRB
 
Success! I set the dynamic vcore to .205v (1.215v vcore+.205v=1.420v) and set the clock ratio to 47 under Advanced Frequency Settings and under Advanced CPU Core Settings. Setting CPU vcore to Normal under Advanced Voltage Settings>CPU Vcore made Dynamic Vcore available. It now benches at 4700 MHz @1.392v (!) :clap: Thank you, very much. I will mark this thread [SOLVED] and put the solution in the first post for easy reference. I'll also add this info to my OC thread for the CPU. :thup:

Perfect.JPG
 
Glad to hear it is working. Was that 1.392v under load? If so that seems like a pretty heavy vdroop.
 
Yup. under load. (CPU-Z bench). My LLC is set to High, too. From past experience that probably measures at 1.356v I'll measure it at the board shortly, to change my sig, and post the actual voltage. Although, the current numbers are more in line with what I've seen posted at OCF and around the web.

As a side note, my 300 MHz cache (uncore) OC also drops under low/no load, and climbs back up to 4400 MHz under load.
 
Last edited:
Back