Guild Wars 2

Hello.
There is no such thing as an official Polish server.
Blacktide has been chosen by the Polish community as an unofficial Polish server(an auxiliary one is called Underworld if i recall correctly). You can check the info on more than one Polish blogs about GW 2.
Do zobaczenia w grze. / See you in the game.

1st rig:
Gigabyte M52L-S3P Motherboard
AMD Athlon II X2 250 @ 3.0 GHz
2 GB RAM 800 MHz
ATI Radeon HD 4850 driver version 12.6
Windows 7 Professional 32-bit
average FPS in range of 18-30 no matter the chosen settings (no visible difference in performance between low and high settings)
GPU-Z shows ~52% of average usage of graphics card throughout a 15 minutes session in Plains of Ashford

2nd rig:
Lenovo IdeaPad Y550
Intel Pentium® Dual-Core CPU T4300 @ 2.10GHz
4 GB RAM
Nvidia Geforce GT 240M driver version 306.02
average FPS in range of 13-26 no matter the chosen settings (slight difference in performance between low and high settings)
GPU-Z shows ~48% of average usage of graphics card throughout a 15 minutes session in Plains of Ashford