Pc displays no signal when watching or gaming

[gelobulan2]

My pc is brand new and when i start playing games or watching movies then after minutes the monitor displays NO signal
PS "all parts are brand new"

 

[Colif]

This can happen if Graphics card isn't supplying enough power to monitor. Check all the power cables attached to GPU are in tight enough.

Might also help if monitor is plugged directly into wall.

 

[rgd1101]

Prebuild by xxx?