My XFX Radeon HD 5870 is performing bad

[kazberxwx]

Hello,

I just got a new video card. A XFX Radeon HD 5870. And its only some games i can run on highest settings.
In games like WoW, Team Fortress 2, Left 4 Dead 2 and Killing floor the framerate is on 10 and 20 most of the time. What is going on?

My system looks like this.

Motherboard Asus P5E3 Pro
CPU Intel Core 2 Quad Q9300 2.5 Ghz(Overcloked to 3.2)
GPU XFX Radeon HD 5870
PSU Chieftain 850 Watt
RAM Kingston HyperX 8 Gb 1600 Mhz

My question is: Why are the framerate so bad in the games?

 

[wa1]

Try the latest driver and make sure all the cables connector are properly inserted...

 

[Mousemonkey]

@knbsk8 please start your own thread instead of hijacking someone else's.