This is from an 8265:
iwm0 at pci2 dev 0 function 0 "Intel Dual Band Wireless-AC 8265" rev 0x88, msi iwm0: hw rev 0x230, fw ver 34.0.1, Associated to an Apple AirPort AP on a 5 GHz channel. Before: bandwidth min/avg/max/std-dev = 11.402/17.410/36.190/4.079 Mbps After: bandwidth min/avg/max/std-dev = 5.147/25.039/54.066/8.489 Mbps $ netstat -W iwm0 | grep "output block" 1 new output block ack agreement 0 output block ack agreements timed out