Graphic card keep crashing and sometimes shut down

When I play video games, my graphic card frequently crashes and has a glitchy display,
such as not showing the movement of the mouse and having delay on every graphical change.

In several cases, my computer will say "graphic card has stopped working and recovered" or stop displaying any thing.

I think it should be whether the problem of the graphic card or the power supply,
but I don't know if I should buy a new graphic card.

Help! as I wanna play video game soon...
2 answers Last reply
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  1. post your pc parts so we can help.
  2. smorizio said:
    post your pc parts so we can help.

    GPU : NVIDIA GeForce GT 520
    CPU : Intel(R) Core(TM) i3-2120 CPU @ 3.30GHz

    Asus CP6230 computer :
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