The best replacement for dual graphics is dedicated.

The best alternatives to dual graphics are rated as following:
★★★★★  dedicated
★★★★★  crossfire
★★★★  crossfirex
★  dedicated memory

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Speaking about dual graphics, one probably shouldn't forget about amd a10.

Other search terms related to dual graphics and their ratings are:
★★★★★ amd a10
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Google Trends

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dual graphics
dedicated
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