[lllary]

well, it's hard to say what driver is best for your card. The DNA drivers works good for me, i choose them for their game performance, as i sayd before, in 3dsmax wireframe mode, i still have your problem, but it is not a problem for me, so i don't care. you should try different drivers until you find the one that solves the problem..
anyway, I think there is no sanse to overclock your card, becouse it doesn't need it. I think it is all about drivers.