Hi, I have installed a GPU in my machine and since I installed it am having problem with it, as whenever I start any game it just lags in between and after sometime the screen goes black, and nothing appears on the screen thus I have to close that game with the help of task manager, and I am not able to understand as what could be the problem because I have cleans install the windows 7 as well but still no luck, so any idea what could be the problem?
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