Yes. For full DirectX 11 hardware acceleration and performance, your graphics card driver must support DirectX 11. Ensure you have the latest official driver from NVIDIA, AMD, or Intel for Windows 7 64-bit.
Here is the informational text you requested regarding downloading DirectX 11 for Windows 7 64-bit. directx 11 download windows 7 64-bit
If you are running a 64-bit version of Windows 7 and need DirectX 11, here is the essential information you should know before downloading. directx 11 download windows 7 64-bit