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Uncertainty about CPU core and Vcore voltage

Uncertainty about CPU core and Vcore voltage

J
JPFence
Member
70
06-28-2018, 03:04 AM
#1
So I've boosted my Ryzen 2700x to 4.1 GHZ and adjusted the Vcore to 1.320v. Everything seems stable. The issue is that both HWI monitor and Ryzen Master display the CPU voltage at 1.21v while the HWI monitor shows the Vcore at 1.32v. I'm wondering if this is typical or if the voltage values should match.
J
JPFence
06-28-2018, 03:04 AM #1

So I've boosted my Ryzen 2700x to 4.1 GHZ and adjusted the Vcore to 1.320v. Everything seems stable. The issue is that both HWI monitor and Ryzen Master display the CPU voltage at 1.21v while the HWI monitor shows the Vcore at 1.32v. I'm wondering if this is typical or if the voltage values should match.

R
Rares9912
Junior Member
21
06-29-2018, 05:08 AM
#2
CPU Core Voltage (SVI2 TFN) refers to the voltage measured by the Voltage Regulator, delivered to the CPU via VRM output. This value is sent to the CPU and analyzed through telemetry functions. Vcore or VDDCR measures the same rail, but through the mainboard logic (ITE chip). I think the SVI2 TFN readings should be more precise. Variations in these numbers may stem from differing measurement techniques and their effect on the data capture. A VID value of 1.550V is frequently incorrect and represents a firmware bug in the CPU that needs fixing with an upcoming AGESA/BIOS update.
R
Rares9912
06-29-2018, 05:08 AM #2

CPU Core Voltage (SVI2 TFN) refers to the voltage measured by the Voltage Regulator, delivered to the CPU via VRM output. This value is sent to the CPU and analyzed through telemetry functions. Vcore or VDDCR measures the same rail, but through the mainboard logic (ITE chip). I think the SVI2 TFN readings should be more precise. Variations in these numbers may stem from differing measurement techniques and their effect on the data capture. A VID value of 1.550V is frequently incorrect and represents a firmware bug in the CPU that needs fixing with an upcoming AGESA/BIOS update.

T
Tyson142
Member
148
06-29-2018, 06:49 AM
#3
The CPU Core Voltage (SVI2 TFN) is the voltage measured by the Voltage Regulator and delivered to the CPU via VRM output. This value is sent to the CPU for evaluation using telemetry functions. Vcore or VDDCR measures the same rail, but through the mainboard logic (ITE chip). I think the SVI2 TFN readings should be more precise. The discrepancy between these numbers may stem from varying measurement techniques and their effect on the readout. A VID value of 1.550V is frequently incorrect and represents a firmware bug in the CPU that needs fixing with an upcoming AGESA/BIOS update.
T
Tyson142
06-29-2018, 06:49 AM #3

The CPU Core Voltage (SVI2 TFN) is the voltage measured by the Voltage Regulator and delivered to the CPU via VRM output. This value is sent to the CPU for evaluation using telemetry functions. Vcore or VDDCR measures the same rail, but through the mainboard logic (ITE chip). I think the SVI2 TFN readings should be more precise. The discrepancy between these numbers may stem from varying measurement techniques and their effect on the readout. A VID value of 1.550V is frequently incorrect and represents a firmware bug in the CPU that needs fixing with an upcoming AGESA/BIOS update.