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Learning about CPU voltages in Intel systems

Learning about CPU voltages in Intel systems

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Her0brine57
Junior Member
23
11-01-2021, 03:01 PM
#1
You're seeing readings that are within typical ranges for your setup. The VID in HWMonitor is normal, and the core voltage values in CPU-Z reflect the actual performance under load. These numbers aren't unusually high for an i9-11900KF on a Z590 board during benchmarking.
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Her0brine57
11-01-2021, 03:01 PM #1

You're seeing readings that are within typical ranges for your setup. The VID in HWMonitor is normal, and the core voltage values in CPU-Z reflect the actual performance under load. These numbers aren't unusually high for an i9-11900KF on a Z590 board during benchmarking.

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JRiley
Member
114
11-02-2021, 05:24 PM
#2
Modern systems don't provide trustworthy voltage readings. CPU-Z works well for clock details, but HWINFO64 is better for this purpose. A reading of 1.68V might seem extreme for the chip, yet it's probably inaccurate as well.
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JRiley
11-02-2021, 05:24 PM #2

Modern systems don't provide trustworthy voltage readings. CPU-Z works well for clock details, but HWINFO64 is better for this purpose. A reading of 1.68V might seem extreme for the chip, yet it's probably inaccurate as well.

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steliux
Junior Member
4
11-02-2021, 09:55 PM
#3
HWINFO64 shows stable performance with Vcore around 0.8-0.9V idle, rising to ~1.4V under load and peaking at 1.661V. The lowest observed is 0.770V, averaging near 1.0V. Overall it's within acceptable ranges for most workloads.
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steliux
11-02-2021, 09:55 PM #3

HWINFO64 shows stable performance with Vcore around 0.8-0.9V idle, rising to ~1.4V under load and peaking at 1.661V. The lowest observed is 0.770V, averaging near 1.0V. Overall it's within acceptable ranges for most workloads.

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zPandaBoy
Junior Member
6
11-04-2021, 12:02 AM
#4
It's a solid performance but not overly impressive. You're aiming for less than 1.5V consistently, which is great for daily use. The voltage readings seem quite high, so you might experience significant thermal throttling.
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zPandaBoy
11-04-2021, 12:02 AM #4

It's a solid performance but not overly impressive. You're aiming for less than 1.5V consistently, which is great for daily use. The voltage readings seem quite high, so you might experience significant thermal throttling.

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xaiden123
Junior Member
26
11-07-2021, 03:44 AM
#5
Didn't experience throttling in tests; temperature reached a high of 94°C with core temps hitting 96°C. It came close but stayed stable. Once the new fans arrive, it should run cooler. Currently idling at 32°C. Peak power consumption was 291W. I'm planning to adjust the offset slightly without losing performance.
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xaiden123
11-07-2021, 03:44 AM #5

Didn't experience throttling in tests; temperature reached a high of 94°C with core temps hitting 96°C. It came close but stayed stable. Once the new fans arrive, it should run cooler. Currently idling at 32°C. Peak power consumption was 291W. I'm planning to adjust the offset slightly without losing performance.

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Fluffycakes123
Senior Member
696
11-07-2021, 05:04 AM
#6
Does your board include a VRVOUT sensor listed in Hwinfo? That would indicate a solid design choice, offering the most dependable voltage measurement.
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Fluffycakes123
11-07-2021, 05:04 AM #6

Does your board include a VRVOUT sensor listed in Hwinfo? That would indicate a solid design choice, offering the most dependable voltage measurement.

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Gugu3000
Junior Member
7
11-07-2021, 10:10 AM
#7
These findings come from the data with Adaptive Vcore enabled in Vcore Voltage Mode. All manual adjustments were eliminated and the system now operates automatically. The average Vcore dropped by roughly 0.050V, though it briefly reached a peak of 1.650V during single-threaded tests.
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Gugu3000
11-07-2021, 10:10 AM #7

These findings come from the data with Adaptive Vcore enabled in Vcore Voltage Mode. All manual adjustments were eliminated and the system now operates automatically. The average Vcore dropped by roughly 0.050V, though it briefly reached a peak of 1.650V during single-threaded tests.

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Skylar180
Junior Member
32
11-07-2021, 11:54 AM
#8
VR VOUT shows almost the same value as Vcore, just a few millivolts away.
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Skylar180
11-07-2021, 11:54 AM #8

VR VOUT shows almost the same value as Vcore, just a few millivolts away.

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MyLym
Member
75
11-08-2021, 04:10 PM
#9
They remain quite alike when idle, but their behavior changes noticeably during operation.
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MyLym
11-08-2021, 04:10 PM #9

They remain quite alike when idle, but their behavior changes noticeably during operation.

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SoiKei
Member
126
11-09-2021, 03:27 AM
#10
The peak voltage has dropped significantly when Vcore Voltage Mode is auto, reaching around 1.620V with a reduction of roughly 20-30mV overall. Most of the time it stays below 1.6V. Turning TVB Frequency Clipping on or off didn’t change the result much. I restored the BIOS to its default settings. It seems that clearing out the per-core ratio limits—where the preferred cores are usually shown—was key to lowering the Vcore to 1.25V during multi-threaded runs and to about 1.40V in single-threaded tests, with a brief spike to 1.428V. The power draw is now 209W, and the package temperature has fallen to 75°C. It looks like I’d need to undervolt it at the same clock speeds as before to maintain a reasonable Vcore level. It appears the unit starts at its maximum performance.
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SoiKei
11-09-2021, 03:27 AM #10

The peak voltage has dropped significantly when Vcore Voltage Mode is auto, reaching around 1.620V with a reduction of roughly 20-30mV overall. Most of the time it stays below 1.6V. Turning TVB Frequency Clipping on or off didn’t change the result much. I restored the BIOS to its default settings. It seems that clearing out the per-core ratio limits—where the preferred cores are usually shown—was key to lowering the Vcore to 1.25V during multi-threaded runs and to about 1.40V in single-threaded tests, with a brief spike to 1.428V. The power draw is now 209W, and the package temperature has fallen to 75°C. It looks like I’d need to undervolt it at the same clock speeds as before to maintain a reasonable Vcore level. It appears the unit starts at its maximum performance.

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