Since Black ops came out long after the 5770, maxing out your settings and res. May be making the GPU too hot. You may have to increase fan speed too.
You might want to look at the manufactures website to see if there are any updates for your card.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.