Yes, the number of ports on an FC network card can affect its performance. The more ports a network card has, the more connections it can support simultaneously, which can increase overall bandwidth and data transfer rates. Additionally, more ports can help to improve network redundancy and availability by providing multiple paths for data to flow. However, it is important to note that simply having more ports does not necessarily guarantee better performance, as other factors such as cable distance, switch configuration, and network load can also impact performance.