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"Page 3 [The Results &amp;amp; The Future of Mantle]... AMD has kind of launched its Mantle API, so we tested it out on two AMD Radeon R9 290X video cards in CrossFire at 4K - come and see the results."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.tweaktown.com/articles/6076/amd-mantle-radeon-r9-290x-crossfire-at-4k-preview-is-it-all-that-it-s-cracked-up-to-be-/index3.html>