Zotac went a step further with its entry level overclocking. The default cards work at 450 MHz while Zotac ships one clocked at 700 MHz. This is a massive 250 MHz overclock and it makes the card much faster.
We are playing with one of these cards now. With these kind of overclocked entry level cards from Gainward and Zotac, it's actually spending your money on them. Zotac wants to aggressively penetrate the Nvidia market and they are definitely getting some attention this way.
Overclocked cards are way to go and the good thing is that XFX and EVGA are not so active in the entry level market. This can easily change as you may imagine.