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I have an i5 2500K with Intel HD3000 onboard graphics, and I have a (really bad) ATI Radeon HD2400 card also plugged in, purely to run an extra monitor from.

How can I ensure that when I play a game, it uses the Intel HD3000 and not the HD2400 to process it? The HD3000 is quite a bit better, but I fear that it assumes that any discrete card is the one that I want to be using, so I'm getting poor performance in games.


(the monitor on which the game is is run from the onboard graphics)

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Which operating system? – Ignacio Vazquez-Abrams Aug 11 '12 at 6:30

I had the same Ati radeon 2400 but i had pro version. It sucks for gaming, but the HD3000 is way better. Unplug your graphics card and try booting your system. It should work. You might need to install some Intel drivers that you got from cd or download newer ones from their web site.

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