Hey there, this morning i replaced my nVidia 9600GT with a MSI R9 270.

When playing with 150+ FPS there starts some noise from the speakers. If i unplug them, its gone, therefore it must be a distortion of the signal, its not comming from the GPU's hardware.
Additionally a thin light waving like smoke before the screen occurs. This is all dependant on the FPS, when look straight up or down, its getting quieter, and becomes louder when im looking in the far plane.

Ive updated so far all drivers (MSI gpu driver, direct x runtimes, mainboard chipset, audio and vga driver).

Its kind of unplayable on 333FPS for more than a few minutes...
The point is, my old nVidia card was able to provide stable and clean 333fps and I excpect from a almost brand new GPU for 150 bucks more than damn playable 150 FPS (8-years-old CoD2!!!!!)

Heres my rig:
- MSI R9 270
- 4GB kingston @ 1333
- i5 3550
- Gigabyte H77-D3H
- BeQuiet E6 500W
- Win7 Professional x64

(I've encountered some more weird things, but seems fixed for now, maybe ill add them if its happaning again)

My next options would be:
- reinstall windows
- send back..

What else could I do?