[Kal-EL]

Try This?
Step 1.)
If you dont have Rivatuner GO DOWNLOAD it google then find a download and install.

(Step 2.)
In the main area of the program once you start the program go to the area that says (ForceWare detected) Click the box to the right of that. then a new icons pop out pick the first one it looks like a Graphics card. New windows opens...

(Step 3.)
For this to work u have to go to where it says
Force constant performance level the drop down box needs to be set to Performance 3D. Now you are half way though.
****Note once you do this your card wont downclock at all this is a temporary fix. all you have to do to disable it is turn this last step back to disable.

(Step 4.)
Click apply then ok. a message will prompt you to restart your PC to activate your changes click no because we have one last thing to do.

(Step 5.)
At the top you should see tab bars click Power User. Their will be another promt if u have not gone to this section of rivatuner b4. (cant exactly remeber what it says but it asks if u want to se the message every time and if ur a poweruser. click that ur a power user.

(Step 6.)
Find this
+RivaTuner\NVIDIA\Overclocking
click the + sign and it opens new options
Now find EnablePerfLevelForcing and click the check to the left of this tab ONLY. then to the right up top it should say value
Type in 1 to the right of EnablePerfLevelForcing.
Then press ok

Make sure fo reboot.