Graphics problems

Since I got back from holiday my graphics have been playing up some what. Not all the time, but can be at the most inappropriate times.
These are the kinda results I get in Flight Sim

and other graphic intensive programs are effected too, like EVE

My system specs are in my signature, I've got the majority of recent Windows updates, Nvidia 52.16 drivers (Rolled back from 53.03, same effect) and Directx 9.0b
Thanks
These are the kinda results I get in Flight Sim

and other graphic intensive programs are effected too, like EVE

My system specs are in my signature, I've got the majority of recent Windows updates, Nvidia 52.16 drivers (Rolled back from 53.03, same effect) and Directx 9.0b
Thanks
