it's only a problem if you force it to a speed lower than the speed it reaches if the card gets too hot. so force at max would be fine. it's also louder but the extra power draw is minimal, shouldn't affect the psu.
ok thanks for the reply man! i forced it to the maximum and it has some noise but i dont care about it. i wont damage the card forcing it to max right? i am using the gpu tweak from asus