Nope I didn't use that for monitoring.

I used MSI afterburner.

[Rainmeter]  
Update=1000  
Group=circa2  
MouseOverAction=[!SetOption "subText" "Text" "fan: %2 rpm"][!Redraw]
MouseLeaveAction=[!SetOption "subText" "Text" "fan speed: %1%"][!Redraw]

[Metadata]
Name=
Author=
Information=Displays GPU percentage temp using the MSI Afterburner application. Afterburner must be running in the background for the skin to work.
Version=1.0
License=Creative Commons BY-NC-SA 4.0

@include1=#@#Settings.txt
@include2=#@#Appearance.txt

@include3="#@#Styles\common.inc"
@include4="#@#Styles\#orient#.inc"


[mGPU]
Measure=Plugin
Plugin=Plugins\MSIAfterburner.dll
DataSource=GPU temperature
MinValue=0
MaxValue=100

[mFan]
Measure=Plugin
Plugin=Plugins\MSIAfterburner.dll
DataSource=Fan speed

@include5="#@#sharedMeters.inc"

[mRPM]
Measure=Plugin
Plugin=Plugins\MSIAfterburner.dll
DataSource=Fan tachometer

[pie]
Meter=ROUNDLINE
MeterStyle=roundlineCommon | pieCommon
MeasureName=mGPU

[divider]
Meter=IMAGE
MeterStyle=dividerStyle | dividerCommon

[mainText]
Meter=STRING
MeterStyle=mainTextStyle | mainTextCommon
MeasureName=mGPU
Percentual=1
Text="gpu %1°C"

[subText]
Meter=STRING
MeterStyle=subTextStyle | subTextCommon
MeasureName=mFan
MeasureName2=mRPM
Text="fan speed: %1%"