It's 1 lane, but a 16x connector to allow plugging in any device. PCIe devices can be downgraded into a lower number of lanes. Many motherboard 16x connectors a

It's 1 lane, but a 16x connector to allow plugging in any device. PCIe devices can be downgraded into a lower number of lanes. Many motherboard 16x connectors aren't even a full 16x.