it would be good 2 keep your temp the way they are after you over clock the card, but that's unlikely with stock hsf. i say u should mod it, put a pentium 4 hsf on it or somthing, the geforce board mostly comes with 4 additional mounting holes, make good use of those.
1st: get a CPU hsf that fits on your card, if it dson't ,u can always get rid of bits of it 2 make it fit
2nd: put the hsf on your card and make sure the core is in good contact with the hsf.
3rd: mark teh 4 hole on the bottome of the hsf and drill drill drill .....
4rd: put on some grease and screw the sucker in place
5th: take it for a test run and watch the temp drop
ps: the ideal hsf for this job would be the Thermal Take mini copper orb.. it performs alrite and it's not 2 big