Just done some changes at my config.

Ingame name: Rayses ~
Resolution: 640x480 @ 120hz
CrosshairSize: Large
DymnaticCrosshair: 0
Windows sens: 3/11
Ingame sens: 2.5

PC: Dell XPS 8300
Professor: Intel Core i7
Grapichcard: AMD RADEON 6870
Monitor: BenQ XL2410T
Keyboard: Roccat Arvo
Mousepad: SteelSeries QcK Fnatic
Mouse: SteelSeries Sensei
Headset: SteelSeries Siberia V2 Full Size

Mouse settings to SteelSeries Sensei:
DPI 1/2:1600
Freemove: 0
Exactaccel: 0
Exactaim: 0
Exactlift: 7%
Polling rate: 500 Hz

Grapich Card: AMD Radeon 6870
ATi 3D Settings:
Anti-Aliasing: 8X
Anisotropic Filtering: 16X
Tessellation: 64X
Texture Filtering Quality: High Quality
Vertical Refresh: Always off
Anti-Aliasing mode: Super-sample AA