Wait is this your card?http://www.newegg.com/Product/Product.aspx?Item=N82E16814261067
It does not even have active cooling ( a fan ) so it sure is not any "perfect card for overclocking" also it has a 450mhz core and you can get it to 625 before it crashes? That is one hell of an overclock......just how high do you think it should go? You are lucky it overclocks at all. Also Palit is not exactly the best manufacturer.