ASUS
ASUS Dual-Band 3x3 AC1750 WiFi 4-Port Gigabit Router
Bottom line: The ASUS Dual-Band 3x3 AC1750 WiFi 4-Port Gigabit Router ($104.99 on Amazon as of 2026-10-07): Concurrent 2.4GHz + 5GHz bands rated up to 1.75Gbps combined; main trade-off: USB 2.0 ports cap external drive throughput well below USB 3.0.
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*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Concurrent 2.4GHz + 5GHz bands rated up to 1.75Gbps combined
- ✓ Three detachable R-SMA antennas let you swap in higher-gain units
- ✓ Four Gigabit LAN ports for wired PCs, consoles, and NAS
- ✓ Two USB 2.0 ports run file, DLNA, and printer sharing
Cons
- ✗ USB 2.0 ports cap external drive throughput well below USB 3.0
- ✗ Wi-Fi 5 era hardware, so no WiFi 6 OFDMA or 160MHz support
- ✗ 1.75Gbps is the combined dual-band figure, not a single-client speed
- ✗ AiCloud remote access depends on ASUS servers staying supported
Manufacturer description
The ASUS RT-AC66U is a dual-band 802.11ac router built around Broadcom's 5th-generation Wi-Fi chipset, pushing combined 2.4GHz and 5GHz data rates up to 1.75Gbps. If your household runs several 5GHz devices at once, the concurrent dual-band design keeps streaming traffic off the crowded 2.4GHz band while older devices stay connected. Three detachable R-SMA antennas paired with ASUS AiRadar beamforming amplify the signal toward your devices, which ASUS rates at over 50% wider coverage than standard N-spec hardware. Four Gigabit Ethernet ports handle wired desktops, consoles, and NAS boxes…
SpecPicks Verdict
SpecPicks scored ASUS Dual-Band 3x3 AC1750 WiFi 4-Port Gigabit Router using a rating × review-volume × price-fit model applied to published specs and reviews across the networking category. ASUS's networking lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for networking of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
How fast is the ASUS RT-AC66U really?
ASUS rates it at up to 1.75Gbps, but that is the two bands added together: roughly 1300Mbps on 5GHz plus 450Mbps on 2.4GHz. A single client connects to one band at a time.
Does the RT-AC66U support WiFi 6?
No. It uses Broadcom's 5th-generation 802.11ac chipset, which is WiFi 5. WiFi 6 devices will connect, but they fall back to 802.11ac rates.
What can I do with the two USB ports?
Both are USB 2.0 and support file sharing, printer sharing, and 3G sharing. Download Master handles standalone downloads to attached storage, and AiCloud makes that storage reachable remotely.
Can I replace the antennas for better range?
Yes. All three antennas are detachable R-SMA type, so higher-gain replacements screw straight on. AiRadar beamforming also focuses the signal toward connected devices.
Is it hard to set up?
ASUSWRT walks you through a three-step web setup, then exposes QoS, multiple SSIDs, signal monitoring, VPN server, and IPv6 settings from the same dashboard.
Key Features
- 5th generation 802.11ac chipset gives you concurrent dual-band 2.4GHz/5GHz for up to super-fast 1.75Gbps
- ASUS AiCloud service: Access, stream, share, sync - all on the go with unlimited storage expansion!
- Gigabit Ethernet ports for the fastest, most reliable internet performance,AiRadar optimizes wireless coverage with detachable high-powered antennas
- Enjoy the ASUSWRT dashboard UI for 3 steps easy setup, signal monitoring, and network application control, Download Master for wireless data storage and access to your router-connected USB storage devices
- File sharing, printer sharing, and 3G sharing via two multi-functional built-in USB ports
- ASUS Ranked “Highest Customer Satisfaction with Wireless Routers in the U.S.”– J.D. Power
Full Specifications
| Brand | ASUS |
|---|---|
| Color | Black |
| Weight | 3g |
| Voltage | 19 volts |
| Coverage | Wide coverage for large homes |
| Frequency | 5 GHz |
| Model Name | RT-AC66U |
| Unit Count | 1 Count |
| Connectivity | Wireless, USB, WiFi, 2.4GHz |
| Model Number | RT-AC66U |
| Built-In Media | Computer Peripherals^Routers^Network Routers^ |
| Control Method | App |
| Item Type Name | Asus Wireless AC1750 Gigabit Router (RT-AC66U) |
| Connection Type | Wireless |
| Controller Type | App Control |
| Mfr Part Number | RT-AC66U |
| Number of Ports | 5 |
| Special Feature | WPS |
| Antenna Location | Monitoring |
| Wi-Fi Generation | Wi-Fi 5 |
| Full listing title | ASUS Dual-Band 3x3 AC1750 WiFi 4-Port Gigabit Router with speeds up to 1750Mbps & AiRadar to Strengthens Wireless Connections via High-Powered Amplification Beam-Forming - 2X USB 2.0 Ports (RT-AC66U) |
Ready to buy?
ASUS Dual-Band 3x3 AC1750 WiFi 4-Port Gigabit Router with speeds up to 1750Mbps & AiRadar to Strengthens Wireless Connections via High-Powered Amplification Beam-Forming - 2X USB 2.0 Ports (RT-AC66U) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.
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