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<\/div>\n

Parmi les nombreuses fonctions exclusives \u00e0 Windows 10, nous n'avons pas encore beaucoup parl\u00e9 de DirectX 12. Pourtant, cette nouvelle version majeure a tout pour r\u00e9jouir les joueurs et les d\u00e9veloppeurs, \u00e0 commencer par un gain en performances retentissant<\/strong>, rendu possible par les nombreuses optimisations apport\u00e9es par Microsoft ainsi que par un changement de philosophie.<\/p>\n

Pour arriver \u00e0 la prouesse promise, Microsoft a d\u00fb s\u00e9rieusement revoir l'architecture de DirectX au sein d'un syst\u00e8me Windows. L'id\u00e9e est d\u00e9sormais de proposer une API (Interface de programmation) \u00e0 bas niveau afin de communiquer le plus directement possible avec la carte graphique<\/strong>.<\/p>\n

\"DirectX<\/p>\n

L'id\u00e9e est assez simple, en se passant d'un maximum d'interm\u00e9diaires, il devient possible d'allouer plus de puissance graphique \u00e0 une t\u00e2che particuli\u00e8re, comme les jeux. En fonctionnant ainsi, il devient en th\u00e9orie plus commode pour un d\u00e9veloppeur d'exploiter toutes les ressources<\/strong> \u00e0 sa disposition.<\/p>\n

C'est malin et \u00e7a rejoint la technique utilis\u00e9e par Mantle sur les cartes\u00a0AMD. Mais \u00e0 la diff\u00e9rence de son concurrent, DirectX 12 s'applique \u00e0 toutes les cartes graphiques<\/strong> du march\u00e9. La d\u00e9mocratisation s'annonce ainsi bien meilleure. Selon l'article de AnandTech, le fonctionnement \u00e0 bas niveau \u00e9tait inenvisageable sous DirectX 11, la version que nous utilisons \u00e0 ce jour.<\/p>\n

\"DirectX<\/p>\n

D'ailleurs, du fait de son int\u00e9gration si particuli\u00e8re avec le noyau de Windows, Microsoft a d\u00e9j\u00e0 d\u00e9clar\u00e9 ne pas \u00eatre en mesure de porter DirectX 12 sur des versions ant\u00e9rieures. Windows 8.1 et Windows 7 n'y auront donc pas acc\u00e8s<\/strong>. Ce qui ne devrait pas \u00eatre tr\u00e8s grave, car ces versions de Windows seront \u00e9ligibles gratuitement \u00e0 la mise \u00e0 jour<\/a> vers Windows 10. Tout va pour le mieux dans le meilleur des mondes !<\/p>\n

Et si on se base sur les performances de la derni\u00e8re Technical Preview de Windows 10<\/a>, les performances sont d\u00e9j\u00e0 bien pr\u00e9sentes. Retrouvez-en un r\u00e9sum\u00e9 sur le graphique suivant (cliquer pour agrandir). Le benchmark Star Swarm montre ainsi des r\u00e9sultats en hausse de pr\u00e8s de 150%<\/strong> avec une GeForce GTX 980 qui passe ainsi de 26,7 images par seconde sous Direct 3D 11 \u00e0 66,8.<\/p>\n

\"DirectX<\/a><\/p>\n

Derni\u00e8re interrogation l\u00e9gitime, qui y aura droit<\/strong> ? Suivant la g\u00e9n\u00e9ration de vos cartes graphiques, le sc\u00e9nario pourrait \u00eatre diff\u00e9rent. Du c\u00f4t\u00e9 de Nvidia, nous savons d\u00e9j\u00e0 que les architectures Maxwell (s\u00e9ries 750 et 900), Kepler (s\u00e9ries 600\u00a0et 700) et Fermi (s\u00e9ries 400\u00a0et 500) auront acc\u00e8s aux bienfaits de DirectX 12. Pour AMD, il faudra imp\u00e9rativement disposer d'un driver compatible WDDM 2.0, ce qui comprend les derni\u00e8res Radeon ainsi que quelques autres mod\u00e8les ant\u00e9rieurs.<\/p>\n