[SOLVED] computer screen turns of a solid color but not freeze

[mrpepo]

i am new here so i dont know what kind of information do you need to help me a little bit with my problem, but the trouble only happend when i am playing a game all the screen turn in a random solid color but the pc still working perfectly, so i can move the mouse and press the keyboard, but how i can t see anything i am forced to hard shut down the pc.
my operative sistem is win 7
the model of the gpu is nvidia gtx560ti

 

[kerberos_20]

either GPU is almost at end of its life, or u need replace your PSU
gpu u can test in another PC (friends maybe?)

 

[mrpepo]

i will try in other pc like last resouce because is so tedious make the change and install the driver in the other computer, there is a way to see the dumps of the gpu? because i think can be the psu in my house there are a lot of power outage and in the last times also i have had blue screens of dead without reason and also when i had put a ram addicional that blue screen of dead increase.