mini DIY routers
mini DIY routers
It won't significantly impact performance since the main issue for active connections remains the CPU, and your WAN port continues handling all traffic through one port. Regarding the devices, newer network cards are built for multi-core support, meaning a 4-core processor pairs well with a NIC that manages four traffic streams. It's unclear how much of a difference this will have in practice, but theoretically it improves efficiency because single-NIC traffic isn't limited by a single core.