SOLUTION FOUND
It's kinda funny, in an odd sort of way.
This appears to have fixed the issue of big fps slowdowns, kicks to desktop, when using NVidia drivers 384.80 and 384.76.
Login to your internet router, and setup port forwarding for the following XBox Live ports (even if you weren't aware you were doing anything at all with XBox Live).
Port 88 (UDP)
Port 3074 (UDP and TCP)
Port 53 (UDP and TCP)
Port 80 (TCP)
Port 500 (UDP)
Port 3544 (UDP)
Port 4500 (UDP)
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