How can a network card affect FPS?
A standard network card cannot, but Killer NIC does. Killer NIC replaces the Window’s network stack with a low latency network stack and the NPU specifically designed for online gaming. This leads to improvement in FPS by reducing the CPU overhead associated with processing network calls (even while there is no data to be processed) and speeding up the time that it takes a packet of data to get from your NIC to the CPU.