I'm not sure I understand this English (is it?) phrase but in case you want to imply that this PowerBook has a Radeon 9200 let me tell you it's Radeon 9700.
> Its not to "heavy" resolution like for MOS3.1? PB will work "fast"?
I run this same resolution (1680x1050) on my Mac mini with a meager 64 MiB VRAM Radeon 9200 fine, so you can be sure it will work even better with 128 MiB VRAM Radeon 9700.