Fan br. obrtaja, ...

Code:

//stavi label i timer...
 
//...i ovu funkciju
function GetCPUSpeed : integer;
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
mov TimerLo, eax
mov TimerHi, edx
end;
Sleep(DelayTime);
asm
dw 310Fh
sub eax, TimerLo
sbb edx, TimerHi
mov TimerLo, eax
mov TimerHi, edx
end;

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

Result := Round(TimerLo / (1000 * DelayTime));
end;

//koriscenje
procedure TForm1.Timer1Timer(Sender: TObject);
begin
Label1.Caption := IntToStr(GetCPUSpeed) + ' MHz';
end;