Fórum Memoria, processador ... #231084

uses 
  Registry; 

function GetCpuSpeed: string; 
var 
  Reg: TRegistry; 
begin 
  Reg := TRegistry.Create; 
  try 
    Reg.RootKey := HKEY_LOCAL_MACHINE; 
    if Reg.OpenKey(´Hardware\Description\System\CentralProcessor\0´, False) then 
    begin 
      Result := IntToStr(Reg.ReadInteger(´~MHz´)) + ´ MHz´; 
      Reg.CloseKey; 
    end; 
  finally 
    Reg.Free; 
  end; 
end;

function GetCPUSpeed: Double;
const
  DelayTime = 500;
var
  TimerHi, TimerLo: DWORD;
  PriorityClass, Priority: Integer;
begin
  PriorityClass := GetPriorityClass(GetCurrentProcess);
  Priority := GetThreadPriority(GetCurrentThread);

  SetPriorityClass(GetCurrentProcess, REALTIME_PRIORITY_CLASS);
  SetThreadPriority(GetCurrentThread, THREAD_PRIORITY_TIME_CRITICAL);

  Sleep(10);
  asm
    dw 310Fh // rdtsc
    mov TimerLo, eax
    mov TimerHi, edx
  end;
  Sleep(DelayTime);
  asm
    dw 310Fh // rdtsc
    sub eax, TimerLo
    sbb edx, TimerHi
    mov TimerLo, eax
    mov TimerHi, edx
  end;


  SetThreadPriority(GetCurrentThread, Priority);
  SetPriorityClass(GetCurrentProcess, PriorityClass);

  Result := TimerLo / (1000.0 * DelayTime);
end;