VCore extremely low

redeyedskink

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Jan 19, 2019
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Hi everyone,

I posted this thread on the GPU forum because I thought it might be a gpu issue, but I may have been wrong.

My computer will randomly blackscreen and restart at times. I've tested nearly everything and then found a weird issue with my voltages.

My voltages tend to fluctuate, especially my vcore. Now i know due to speedstep that a vcore should change, but my min and max value are along the lines of .14 and 1.152. .14 seems extremely low to me and was wondering if this might be a cpu issue or a psu issue.

Thanks for your help.
Specs:
I5-6600k
gtx 960
z170 gaming 5 motherboard
2x8 2200mhz ram
seasonic 550w psu
 
Solution
Cool! No problem.

Still wonder what the problem is. Manual voltage is a good workaround, but it doesn't solve the issue completely.

But hey, at least there is a workaround LOL.
Thank you. I've been reading some information about the z170x gaming 5 motherboard and apparently there are some vcore issues with the motherboard. I get a new PSU in the mail tomorrow and I'm hoping it's just the PSU but I'm not holding my breath
 
So interesting enough, I have now switched the bios setting for my vcore from auto to a manual reading of 1.10. My vcore is registering at only this voltage now. I'll cross my fingers and hope this fixes the issue
 
Yep that will fix it, because your forcing the vcore to run at a fixed voltage. But it is supposed to run fine at auto.

You could also try running adaptive voltage, and leave it at default. See what happens there, that way your CPU vcore can still undervolt if you are worried about power consumption.
 
I'm honestly not that worried about power consumption but I will take a look at adaptive voltage just in case. Looks like it was a z170x motherboard issue and you just have to manually set the voltage, even though it should have been fine at auto 🙁

Thank you for your help!
 
In case you discover it is not fixed try the following. Please go into control panel, power options, click next to your current power plan where it says "Change plan settings" in blue letters.

Next, click where it says "Change advanced power settings". Scroll down to Processor power management. Open the "Min" settings and tell me what it AND which power plan your computer is currently set to use are. Minimum setting for the "Min" value should never be lower than 8% and Max should be 100%, and that is factoring in that you DO have the plan set to performance. Leave all other plan settings the same.

Also, in the bios if you have a setting for Speed shift (Which I don't think you do because I have that exact board although I swapped it out for a Hero VIII because I got tired of some of the voltage issues and limitations as far as being limited by a lack of granularity/options in the Gigabyte BIOS) disable it BUT don't confuse "speed shift" for "speed step". Leave speed step enabled.

If your problem is resolved, by your bios change you already made, then great, but if not then try that. Also, you should not have to disable XMP. That would only increase voltage when using the auto configuration, not decrease it to dangerously unstable levels unless something was terribly wrong with the motherboard or firmware.
 
Hi and thank you for the response.

I thought it could have been a power option issue before so I changed those settings a while back. The computer is set to maximum performance and the min CPU is 7% and the max is 100.
 
Another reason I posted about this is because I've been having troubles with my pc black screening and restarting. Sometimes it happens 5 minutes into a game, other times it wont happen for days. I'm hoping that this Vcore issue is the culprit and that this will fix all blackscreen/restart issues
 
VID and Vcore should usually BOTH change, significantly, based on CPU load, if the min and max CPU power management profiles are not both set to 100% and if Speed step is also enabled. If Speed step is disabled and both min/max profile values are set to 100% then there should be only minimal fluctuation to voltage for Vcore.

VID (Voltage Identifier) = Voltage Level "request" by the CPU to the motherboard's VR (voltage regulator) to supply it, this is initialized by the CPU and can change accordingly if the CPU is in power saving mode like C1E/EIST features, and also each CPU has an unique max VID internally that was set at factory level while they're running at full load. Turning off power saving features like C1E/EIST will overide and disable those feature and the cpu's VID will be permanently set at their max.

VCore = Actual voltage "delivered/supplied" by the mobo to the cpu, this could be automatic from the cpu as the function of C1E/EIST features ... or ... it was manually set and override by user like in OCing, and this "manually set" vcore could be higher/lower than the cpu's VID at mobo with oc-ing capability.

About the voltage reading, VID is just a state or information that is in the CPU, while vcore is the actual voltage, and as usual, software based reading on vcore is not very accurate, expecting +/-10 to 20% off for normal condition.

That's pretty close to accurate. There are some nuances involved but for most intents and purposes, it's fairly accurate. Enough for most, and more than what should be necessary for 99% of people who aren't overclocking.
 


CORSAIR Vengeance LPX 16GB (2x8GB) DDR4 DRAM 2400MHz C14 Memory Kit - Black (CMK16GX4M2A2400C14)

Came together
 
So was your first post where you said it was 2200mhz, which actually isn't even a standard memory speed, not accurate/typo? Do you have the XMP profile set for the memory and is it running at 2400mhz? It's only a minor difference but probably worth doing anyhow if it's not.