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8086K | CPU-Z misleading Vcore HELP!

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post #1 of 23 (permalink) Old 05-31-2020, 06:43 PM - Thread Starter
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8086K | CPU-Z misleading Vcore HELP!

Hey, first off, I run an 8086K on an MSI Z370 GAMING M5

So after almost one whole day of me trying to figure out WHY CPU-Z is showing Core VID a lot higher than my UEFI Vcore manual setting, after finding out about LLC and researching the hell out of it for hours (actually at least I learned a bit of it too so cheers for this), after trying to figure out what am I missing although I did not modify many other settings in the UEFI, and trying to make out my OC steps backwards (because I saw the Core VID a lot higher than the UEFI a lot later in my OC) I somehow remembered where have I seen the actual "correct" readings, and that was in CPU-Z 1.90. At some point I updated to the latest which is 1.92. So I redownloaded the 1.90, and in it I now see again the "correct" Vcore which is the same as in my UEFI, 1.280 for 5.0 GHz all cores OC. After I saw this I quicky checked with HWMonitor, and there is reads 1.310-1.365v as in CPU-Z 1.92, so now i'm thinking that this is the correct value now, and the CPU-Z 1.90 and 1.91 readings were incorrect. But what I still don't understand is why is the Vcore a lot higher than my UEFI manual setting at 1.280v? After googleing, I saw that 5.0 GHz on an 8086K should have Vcore between 1.225-1.350v, so I thought I was safe at 1.280v based on CPU-Z 1.90 as I kept monitoring it (but now I think that the Vcore was a lot higher based on CPU-Z 1.92 and HWMonitor actual readings). As I learned from researching LLC is that for example I should have seen readings of 1.280v in CPU-Z only in idle and lower readings in load, but my problem is that the Vcore readings are higher than that... I tested with LLC Mode 8 at 1.350v and the readings were the same! 1.310-1.365v. So there was a bug in Vcore readings on older CPU-Z versions? I checked the changelogs and there was nothing specified about it. WHAT AM I MISSING HERE PLEASE?! In the screenshot you can see both CPU-Z 1.91 and 1.92 COre VID readings.

EDIT: Now I see that CPU-Z 1.91 didn't have bad readings at all... 1.90, 1.91 are showing the Core Voltage while 1.92 is showing the Core VID, they changed the sensor reading in that sensor space.

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Last edited by razzvan08; 06-01-2020 at 02:39 AM.
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post #2 of 23 (permalink) Old 05-31-2020, 06:47 PM
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stop using CPU-Z and HWMonitor to monitor vCore, lol.

use HWInfo, and look at VR VOUT if you have it.

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post #3 of 23 (permalink) Old 05-31-2020, 07:48 PM
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^ I agree. Uninstall hwmonitor completely and use hwinfo64 instead.

Also I run my 8086K 50x all cores @ 1.22v for reference. The higher voltage mentioned in the OP of ~1.3# is way too high for the 8086K... Those readings of 1.3# seems like VID readings which are not true / actual vcore readings.

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post #4 of 23 (permalink) Old 05-31-2020, 07:57 PM
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Quote: Originally Posted by iunlock View Post
^ I agree. Uninstall hwmonitor completely and use hwinfo64 instead.

Also I run my 8086K 50x all cores @ 1.22v for reference. The higher voltage mentioned in the OP of ~1.3# is way too high for the 8086K... Those readings of 1.3# seems like VID readings which are not true / actual vcore readings.
1.3x die sense VCore is not high at all if you delid.

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post #5 of 23 (permalink) Old 05-31-2020, 08:29 PM
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Quote: Originally Posted by OLDFATSHEEP View Post
1.3x die sense VCore is not high at all if you delid.
Not from my experience with multiple 8086K's and 8700K's.... If you need more than 1.30v to run 50x on an 8086K then you've been doomed...

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post #6 of 23 (permalink) Old 05-31-2020, 09:01 PM
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Quote: Originally Posted by iunlock View Post
Not from my experience with multiple 8086K's and 8700K's.... If you need more than 1.30v to run 50x on an 8086K then you've been doomed...
Sorry I didn't notice you were talking about 50x. OFC 8086K should need around 1.2V socket sense voltage for 50x.

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post #7 of 23 (permalink) Old 05-31-2020, 09:17 PM
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All good. Yea all of my 8086K's have done well in the low 1.2#v's...

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post #8 of 23 (permalink) Old 06-01-2020, 02:29 AM - Thread Starter
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Quote: Originally Posted by iunlock View Post
^ I agree. Uninstall hwmonitor completely and use hwinfo64 instead.

Also I run my 8086K 50x all cores @ 1.22v for reference. The higher voltage mentioned in the OP of ~1.3# is way too high for the 8086K... Those readings of 1.3# seems like VID readings which are not true / actual vcore readings.
Ok so now you had me googleing for CORE VID vs Vcore, I found out that "VID is the voltage the CPU uses at any particular moment while Core Voltage (UEFI) is the limit of the voltage the CPU can use" but in my case it's the whole way around... HWiNFO reads VID at 1.310v and in the MSI Z370 tab the Vcore states 1.280v as I have set in UEFI. But nontheless, it's too much. 1.280v is pretty stable in my benchmarks, while 1.275v gives BSOD... why are my VID readings in Windows showing 1.310-1.365v (way more than the 1.280v Core Voltage)? I'm at 40C in idle, room temp at 23C. I have just started OC-in it a week ago, after having it on 4.0 GHZ all cores fixed OC from the moment I bought it a year ago.

PS: Now I see that CPU-Z 1.91 didn't have bad readings at all... 1.90, 1.91 are showing the Core Voltage while 1.92 is showing the Core VID, they changed the reading in that sensor space, you can see this in the screenshot I posted.

EDIT 1: "VID is the voltage requested by the processor. Vcore is the voltage actually supplied by the motherboard to the processor. This is the number you should be looking at." (reddit)
Ok so after reading this then I should not be worried? As I understand, the Core Voltage is what i should be looking at, so 1.280v is correct. But what about the VID reading? Is the CPU saying it needs 1.310-1.365v?

EDIT 2: Ok so what i'm trying to find out now is, if my Vcore is 1.280, am I safe with VID at 1.310-1.365v? Should I not mind at all about the VID and just work out with the Vcore? Is VID important when you OC or just care solely about the Vcore?


Last edited by razzvan08; 06-01-2020 at 06:30 AM.
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post #9 of 23 (permalink) Old 06-02-2020, 03:28 AM
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Quote: Originally Posted by razzvan08 View Post
Ok so now you had me googleing for CORE VID vs Vcore, I found out that "VID is the voltage the CPU uses at any particular moment while Core Voltage (UEFI) is the limit of the voltage the CPU can use" but in my case it's the whole way around... HWiNFO reads VID at 1.310v and in the MSI Z370 tab the Vcore states 1.280v as I have set in UEFI. But nontheless, it's too much. 1.280v is pretty stable in my benchmarks, while 1.275v gives BSOD... why are my VID readings in Windows showing 1.310-1.365v (way more than the 1.280v Core Voltage)? I'm at 40C in idle, room temp at 23C. I have just started OC-in it a week ago, after having it on 4.0 GHZ all cores fixed OC from the moment I bought it a year ago.

PS: Now I see that CPU-Z 1.91 didn't have bad readings at all... 1.90, 1.91 are showing the Core Voltage while 1.92 is showing the Core VID, they changed the reading in that sensor space, you can see this in the screenshot I posted.

EDIT 1: "VID is the voltage requested by the processor. Vcore is the voltage actually supplied by the motherboard to the processor. This is the number you should be looking at." (reddit)
Ok so after reading this then I should not be worried? As I understand, the Core Voltage is what i should be looking at, so 1.280v is correct. But what about the VID reading? Is the CPU saying it needs 1.310-1.365v?

EDIT 2: Ok so what i'm trying to find out now is, if my Vcore is 1.280, am I safe with VID at 1.310-1.365v? Should I not mind at all about the VID and just work out with the Vcore? Is VID important when you OC or just care solely about the Vcore?
Think of it as VID is the voltage the CPU thinks it needs, or the voltage Intel wrote on a table per a given load/frequency the CPU would request.

At 800mhz (idle) my 9900KS has a 0.665v VID while the actual VCORE is about 0.648v. At 5,300mhz with OCCT large/AVX2 the vid is 1.514v but the VCORE is 1.394v at LLC5 on my Asus Gene motherboard.

What matters is the actual voltage when at load.
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post #10 of 23 (permalink) Old 06-02-2020, 03:35 AM - Thread Starter
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Yeah now it adds up. When I was at 1.280vCore the VID was 1.310-1.365v, but after trying to get 3 runs of Asus ROG RealBench it always crashed in the first 2 runs, so I slightly added Core Voltage and now I'm stable at 5.0GHz - 1.340v after 6 runs (3 runs x 2 times) so just in between what VID read in the first place.

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