Question Monitor turning off while gaming

Pow3rSl1d3

Honorable
Mar 28, 2019
2
0
10,510
I have a a HD4850 and after gaming for some time,my screen turns off and one of 2 red leds on the gpu comes on.It works fine when i reboot it but happens again while gaming
Is this a psu or a gpu problem? I have a Xilence XP450 450w psu with 2x molex to 6 pin adapter
Some people say that one LED means that there is a PSU problem,but im not sure.What do you think?
Card works fine on the desktop.
 

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