3 Things to Know About the Synology DS1621+ PCIe Slot
Regarding the Synology: 1. The DS1621+ ships with four Gigabit Ethernet ports, which are adequate but not impressive for high-speed networking.
Its internal PCIe 3.0 x8 slot is wide enough to support a 10GbE or even a 25GbE network card, giving you genuine headroom for future upgrades.
Most NAS units cap their expansion slots at x4 or x2, so the x8 lane count on this model is a meaningful advantage for high-bandwidth networking.