Acidentaly chose wrong answer

[Alederangle]

I accidentally clicked "choose as best answer", now an answer that I didn't want is selected. How do I undo?

In case a moderator can solve this, the thread I'm referring to is
Very low FPS on a good gaming PC

http://www.tomshardware.com/answers/id-2643936/low-fps-good-gaming.html#xtor=EPR-8809

My apologies for the confusion and thank you in advance.

 

[USAFRet]

Undone per your request.

 

[Alederangle]

Undone per your request.

thank you very much