macOS Sierra drops wifi

Hey all, just built a new machine and installed Sierra on it. Everything works fine, installed Nvidia drivers, the system recognises the GPU immediately almost no further editing needed. One thing that is not working is wifi, it connects on startup for about 30 secs and then drops connection. The TP Link TL-WN851ND is recognised, and shows the wifi status as connected.

Any help will be appreciated

thanks!

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macOS Sierra drops wifi