GigaPlus 2.5-gigabit PCIe card on a Realtek RTL8125B, brackets both ways
2500 Mbps · Realtek RTL8125B · one RJ45 socket · fits ×1, ×4, ×8 and 16 · two brackets · driverless on Windows 10 · heat dissipation named without a part
A single-socket 2.5-gigabit card that names its controller, counts its socket once, and describes its cooling as excellent without naming a heatsink or a fan.
Best for: A build where the driver has to be sorted out on a system that is not Windows 10, and where knowing the exact chip beforehand is worth more than a brand name.
≈ $20 / £20 / 20 €