Not optimum resolution

[anant.kgupta619]

Yesterday when I was operating my windows 7 then then the screes started showing pixels then it crashed and again starts this was done 3 times.After that I shut down computer and started again it was working correctly and operated in 3 hours.
After some time when I started then after 5 seconds it hanged and green
Lines and a dialogue box appeared "Not optimum resolution required 1920×1080 60Hz". I have msi ati graphic card S model and when I removed my graphic card and connected vga cable to my mercury mother board and it was started properly.

 

[Colif]

MERGED QUESTION
Question from anant.kgupta619 : "Not optimum resolution"

Yesterday when I was operating my windows 7 then then the screes started showing pixels then it crashed and again starts this was done 3 times.After that I shut down computer and started again it was working correctly and operated in 3 hours.
After some time when I started then after 5 seconds it hanged and green
Lines and a dialogue box appeared "Not optimum resolution required 1920×1080 60Hz". I have msi ati graphic card S model and when I removed my graphic card and connected vga cable to my mercury mother board and it was started properly.