I run a i5 2400 and nvidia gtx 660ti psu: CM gx 650 w my temps are 60 deg for cpu when i am playing and 40 deg for gpu and my comp reboots when am playing the games is 60 -63 deg very high for the cpu?
Also, check your power supply. Spontaneous reboots can be caused by a power supply that has a faulty voltage regulator or capacitor - especially when extra power is being generated when the graphics card is under full load (i.e., when gaming). You may need to get a power supply tester to verify the voltage regulation on the 12V rails that supply the video card's power.
I cheked up with all the hardware and stuff from a tech and he says theres no fault with it . he tried using his own monitor to play and tehre hasnt been any problem even after 15-20 mins of play his res was 1280x1024.. any suggestions?