How do you use dual display for games?

[fyleow]

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[CubicZirconia]

You can't with any nvidia cards. One display will always be disabled when you're playing a game.

 

[fyleow]

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[ProviaFan]

No consumer-level video cards that I know of can accelerate OpenGL across both monitors. That capability is reserved for workstation-class cards, AFAIK.