Why is my computer not compatible with Miracast?

So I built a brand new computer and it runs Windows 8.1 Pro right now, but it apparently doesn't support Miracast, because when i go to Project i don't see "add wireless display" button, can you please explain to me why my Windows 8.1 pro doesn't
support Miracast, does my motherboard or my Wifi Card has to be built in with Miracast?

Hello vitalik128,
Do you mean that you can’t find the option to add a wireless display?
We could take the following steps to check if the Miracast is supported by the driver.
1. Run dxdiag.exe to use DirectX Diagnostic Tool
2. When the DirectX Diagnostic ToolPage opens, click save all information
and then a DxDiag.txt will be created.
3. Open the DxDiag.txt and use the shortcut ctrl + F to open
Find, and search for the keyword Miracast, then we could find out if the driver is Miracast supported.
• If it is supported, we will need to install the latest drivers for your PC and the latest firmware for your wireless display or Miracast adapter. For more info about installing drivers on your PC, see Download and install drivers.
http://windows.microsoft.com/en-hk/windows-8/all-drivers
To update firmware on your wireless display or adapter, go to the Support section of the manufacturer's website, search on your specific device, and follow their instructions to download and install that firmware. You can also check the Windows Store to see
if there’s an app from the manufacturer of your wireless display or Miracast adapter that updates firmware.
• If it is not supported , we will need to buy a Miracast supported device.
For more information, please take a look at the following article.
http://windows.microsoft.com/en-hk/windows-8/project-wireless-screen-miracast
Best regards,
Fangzhou CHEN
Fangzhou CHEN
TechNet Community Support

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