Quote Originally Posted by MonsieurVerde View Post
It's not about what API it supports it's about how powerful the card is to support the demands of the game.

Quite a few people are still stuck in DirectX 10 and only Windows 7 Supports DirectX 11...which not everyone has.
Quote Originally Posted by Microsoft
Overview
Microsoft DirectX is a group of technologies designed to make Windows-based computers an ideal platform for running and displaying applications rich in multimedia elements such as full-color graphics, video, 3D animation, and rich audio. DirectX includes security and performance updates, along with many new features across all technologies, which can be accessed by applications using the DirectX APIs.

System Requirements
Supported Operating Systems:Windows 7;Windows Server 2003 Service Pack 1;Windows Server 2003 Service Pack 2;Windows Server 2008;Windows Vista;Windows XP Service Pack 2;Windows XP Service Pack 3
As was stated like first couple pages of this thread. DX11 is supported on XP. Not XP and XP SP1 (as MS has dropped support for them entirely), but if you run XP you shouldn't be running with out the latest service pack anyway.

The latest DX11 as 041811: http://www.microsoft.com/downloads/e...a-9b6652cd92a3

(Latest version gets installed when you update to latest Nvidia/AMD drivers too since they both just came out with updated drivers)