Terminology confustion (7900GTX part 2)

[Pixi]

Ok, so I got the new Gainward 7900GTX card. After reading reviews and whatnot on the new nVidia hardware I was under the impression that the core clock would move at about 650mhz and the memory clock would be, roughly, 1600mhz (give or take depending on make and model). So far so good. I like big numbers hehe.

However, with the card installed I head into the nVidia display options and see this:

Core clock frequency: 650mhz
Memory clock frequency: 800mhz

So, um, what gives? Mind you, the card performs well and games are silky smooth (oblivion goes from "wow" to "omfgimgonnadieitssobeautiful") but that memory clock frequency bothers me a bit. So - I'm suspecting that I'm being confused on terminology or that numbers can be represented in different ways. I can set the over clocking sliders to 960mhz on the memory clock but it's a far cry from the 1600-ish mhz I see on reviews etc.

Anyone with the know-how feel like enlighten me?