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Laptop won't charge while gaming.

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I have an Asus G72GX gaming laptop, using a Rocketfish 90w AC Adapter. While running games (World of Warcraft, Dead Island, Fallout 3/New Vegas, ect. ect.) the ac adapter turns off. If I unplug/plug it will turn on, and keep charging, but only while tabbed out of a game. Running in full screen/windowed full screen doesn't make a difference. I realize games put more stress on the battery than just surfing the web, or playing flash games, but this problem didn't start till about a week ago. Any help or information would be appreciated.
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Hi Kipritank and :)
This is most likely caused by using an underpowered AC adapter, it may have worked initially but while it has been in use it has been operating under stress which has weakened it.
The specs for the AC adapter that is supplied by ASUS for use with the Asus G72GX;

AC Adapter
Output: 19 V DC, 4.74 A, 150W
Input: 100~240 V AC, 50/60 Hz universal
Full specs http://www.asus.com/...#specifications

Also be aware that other components such as the battery, CPU, Ram and the integrated video chip will also have been affected by using an inferior AC adapter.
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