Sorry for the missing information.
As I said I have a AMD R9 270. I'm running Window 7 Profesional 64bit on a desktop with the following specs:
i5-4430 CPU @ 3.00 GHz, a quad core i believe.
8GB of RAM.
A HP x23LED 1920x1080 and a Philips 170S 1280x1024, really ancient stuff.
Not sure what motherboard I have but i can look it up if it is important to solve the problem, i believe it's an Intel 8 series C220
I hope this is enough information, please let me know if you need any more
Thanks for helping me out