follow this steps on processor fan not on the graphic card
lets go ur processor fan looks like that
or any other look np
see Intel mark ?? remove only part of it put some oil on the hole u will found after removing only part of it (make sure that u cleaned oil under the mark)
cover it again and put on the processor open ur pc
(ATTENTION:IF U DON`T HAVE EXPERIENCE ON COMPUTER TECH DON`T DO THIS STEPS LAST TIME I DID SOME THING WRONG I SMELL BURNING FROM MY HARD DISK)
BETTER:BUY ANOTHER FAN