The card is MSI N220GT MD1G

I have the card since more than a year, no changes to software or anything hardware has happened, the fan goes for 1-2 minutes a 100% I think than it slows down, when i touch it with mx finger it goes back to another 100 percent, than it slows down again. The fan has a 3 pin plug, although I have yet to find a software that would allow me to set the fan speed (newest EVGA / MSI afterburner)

Must I really buy a new fan? What cheap fans do work with this card? thanks