Thanks for your reply, erik. That´s very interesting because the only laptop I saw by now with T7800 is T61. Dell offers right the extreme versions X7800 and X7900 (in gaming notebooks). So, as you say X7ttt are designed for gaming purposes, I guess there is a very small chance to see them in a ThinkPad since TPs are supposed to serve to business purposes. That´s a pity because TPs are also beloved in science and it´s nice to have a mobile powerful computing unit

Certainly, laptops cannot be compared with desktops or supercomputers at all, but stil... At least such laptops would be very very helpful, I think

Maybe the only problem with "scientifical laptops" is the improvement of cpu productivity and by now this is only possible through increasing takt frequence or adding kernels, which results in more heat, and more heat just kills cpu productivity (at least from what I saw). So, the way out is not that simple...
Cheers
Marin
IBM Lenovo Z61p | 15.4'' WUXGA | Intel Core 2 Duo T7400 2x 2.16GHz | 4 GB Kingston HyperX | Hitachi 7K500 500 GB + WD 1TB (USB) | ATI Mobility FireGL V5200 | ThinkPad Atheros a/b/g | Analog Devices AD1981HD | Win 7 x86 + ArchLinux 2009.08 x64 (number crunching)