Hi folks, I lately encounter a strange problem. The screen goes blue like this:

http://www.loaditup.de/files/631955_d6xncfaaeh.jpg

There's no crash or freeze and as you can see, the Hud is still amber.
The GPU temperatures seems to be fine (round about 50 - 70 °C) as well as the CPU (round about 55°C).
I'm playing with maxed out settings, 2 DLCs are installed, no Mods, latest patch is installed via steam.


My System
MB: Asrock Fatal1ty P67
RAM: 4096MB RAM
CPU: Intel Core i7-2600K @3.40GHz
GPU: NVIDIA GeForce GTX 460 (Driver Version: 8.17.12.7533)
PSU: Corsair AX750
Sound: onboard
OS: Windows 7 Home Premium 64-bit SP 1


I'm pretty clueless on here.

Any Suggestions?