ALCPU Forums

Posted: **Wed Mar 13, 2013 3:00 pm**

Hi,

I'm doing a project for college and I'm having difficulty getting the TDP processor.

Where do I find the api to get the TDP?

thank you

Posted: **Wed Mar 13, 2013 10:43 pm**

There is no API for TDP. Every CPU vendor chooses a different method of accessing this information.
In either way, it has to be direct access to hardware, which would require you to use a kernel-mode driver.

Posted: **Fri Mar 15, 2013 3:49 am**

Ty!

What about cpu voltage?

I'm trying to get it from Win32_Processor WMI class and it is always 1 (CurrentVoltage).

Code: Select all

procedure TForm2.GetKernelPerfStateInfo;
const
  WbemUser            ='';
  WbemPassword        ='';
  WbemComputer        ='localhost';
  wbemFlagForwardOnly = $00000020;
var
  FSWbemLocator : OLEVariant;
  FWMIService   : OLEVariant;
  FWbemObjectSet: OLEVariant;
  FWbemObject   : OLEVariant;
  oEnum         : IEnumvariant;
  volt : uInt16;  //uint16    word
  volt2 : uInt32;  //uint32   longword
  v : longword;
begin;
  FSWbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
  FWMIService   := FSWbemLocator.ConnectServer(WbemComputer, 'root/CIMV2', WbemUser, WbemPassword);
  FWbemObjectSet:= FWMIService.ExecQuery('SELECT * FROM Win32_Processor','WQL', wbemFlagForwardOnly);
  oEnum         := IUnknown(FWbemObjectSet._NewEnum) as IEnumVariant;
  while oEnum.Next(1, FWbemObject, v) = 0 do
  begin
    NullStrictConvert := False;
    Volt := FWbemObject.CurrentVoltage; //uint16
    volt2 := FWbemObject.VoltageCaps;  //uint32
    Label5.Caption := 'Current Vcore : '  + IntToStr(Volt) + ' v VoltageCaps : ' + IntToStr(Volt2) + ' v';
    FWbemObject:=Unassigned;
  end;
end;

Posted: **Fri Mar 15, 2013 8:04 am**

Same reply as with TDP.
I don't use WMI as you can't rely on it to provide you with solid and accurate information.

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