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Changed graphics card, now imac turning off when playing HQ games

iMac - MacRumors Forums - forums.macrumors.com
Hi

I changed the graphics card in my late 2009 iMac to the 6970m 2gb card.

It all works fine until I start playing a game on steam. This is a very high-quality game and I would imagine that it would take up a lot of power.

The problem I have is that when in-game, the iMac will turn off after about 2 minutes of gameplay. This will keep happening every time I try to play the game.

Any help would be greatly appreciated.

Thanks

 


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