If you see a website offering a "DirectX 12 download for Windows 10 64-bit", it is likely a installer. The genuine runtime is only from Microsoft via Windows Update or the official DirectX End-User Runtime Web Installer (which only adds older DX9/10/11 components, not DX12).
How to install the latest version of DirectX - Microsoft Support directx 12 windows 10 64 bit download
Instead, here are the of DirectX 12 that you get automatically with Windows 10 (64-bit): If you see a website offering a "DirectX
Since there is no separate installer for DX12 on Windows 10, updates are delivered through the OS. directx 12 windows 10 64 bit download
There are three primary methods to ensure DirectX 12 is installed on a Windows 10 64-bit system.
The software interface is only as good as the hardware driver.