8600GTS Under powered?

SteelZ

Distinguished
Jan 25, 2007
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18,630
I have a friend who just bought his GigaByte 8600GTS,
when i went to his house to install it i notice he only had a 315 W power supply, I got worried.
He had only 1 extra 4pin molex to slot in the 6pin converter. It managed to Power up, But after 2hours of non stop gaming, lines started to appear on the screen and would not go away till rebooted.

Is this is sign of underpowered Gpu :?: