One thing I really can't stress enough about the TOP line-up of graphics cards from ASUS is that they are more than just a few extra MHz on the core and memory. Past experience has always shown that the clocks offered by a card carrying this marking are clearly above the norm.

What's interesting, though, is that this time around ASUS has not only got a TOP card on offer but also an Extreme one for the GTX 285. The TOP is the lower clocked of the two and what we’re hoping is that ASUS hasn’t just decided to ease off the MHz simply to squeeze a few more dollars out of people wanting even more performance.
http://www.tweaktown.com/reviews/174...ard/index.html