Since Shader Model 6.5 is a feature set delivered through updates, "downloading" it involves a three-step process: verifying hardware, updating DirectX, and updating GPU drivers.
A: No. If a website offers you a "ShaderModel6.5_Setup.exe" file, do not run it. That is malware. The only legitimate way to get this is via Windows Update and GPU drivers. Shader Model 6.5 Download
Instead, simply:
Unlike a driver or an app, Shader Model 6.5 is a feature level built directly into your GPU hardware and your Operating System. If you are looking for the "Shader Model 6.5 download," you are actually looking for the specific drivers and OS updates that enable it. Since Shader Model 6