ASUS RT-AC66U 802.11ac Dual-Band Wireless-AC1750 Gigabit Router Reviewed
Test Description RT-AC66U
WAN - LAN 836 Mbps
LAN - WAN 839 Mbps
Total Simultaneous 819 Mbps
Maximum Connections 30,069
Firmware Version 22.214.171.124.164
ASUS Buffalo NETGEAR ASUS
RT-AC66U WZRD1800 R6300 RT-N66U
FAT32 Write 9.0 7.3 8.6 10
FAT32 Read 9.9 11.8 10.2 12
NTFS Write 13.5 8.4 11.3 17
NTFS Read 9.4 8.7 10.3 11
All three use the same Broadcom BCM4706 CPU. At 256 MB, the AC66U has double the memory of the other two routers,
but the same amount of flash. The same Broadcom BCM4331/BCM4360 radio SoCs are used in all three products.
But the ASUS is the only one of the three to use dual-band external antennas vs. six internal single-band. This means the
external circuitry connecting the radio SoCs to the antennas is different. It looks like the Skyworks 5 GHz amplifiers made it
into ASUS' design. The BCM4360 5 GHz radio is toward the top of the photo; the BCM4331 2.4 GHz radio is toward the bottom.
Removing the bottom plate revealed 128 MB of Samsung flash (K9F1G08U0D) and 2 MB of Macronix serial flash (25L1606E).
There are no thermal pads connecting the plate to the board, so thermal connection must be made from board inner layers
through the six metal standoffs that connect the plate to the board.