Introduction
The Asus RT-AX89X is a high-performance Wi-Fi 6 router designed to meet the needs of both home users and professionals. In this overview, “Asus RT-Ax89x Firmware Explained: Review, Pro Features, Merlin Support, and Current Price,” we highlight the latest firmware updates that strengthen security and improve AiMesh stability.
With dual 10G ports and advanced features, the RT-AX89X delivers top speed and flexibility. However, it’s worth mentioning that support for Merlin firmware is limited, mainly due to the router’s Qualcomm chipset. With its fair price and frequent updates, the RT-AX89X is a top pick for fast, secure networking.
| Feature | Description |
|---|---|
| Router Model | Asus RT-AX89X |
| Wi-Fi Standard | Wi-Fi 6 (802.11ax) |
| Firmware Version | 3.0.0.4.388_33744 (March 2025) |
| Firmware Focus | Security improvements, AiMesh stability, bug fixes |
| Processor | Qualcomm IPQ8078 Quad-Core |
| RAM | 1GB |
| Wi-Fi Speed | Up to 6000 Mbps combined |
| Wi-Fi Streams | 8×8 5GHz and 4×4 2.4GHz |
| Dual 10G Ports | 10 GBase-T (copper) and 10G SFP+ (fiber) |
| LAN Ports | 8 Gigabit LAN ports |
| AiMesh Support | Yes, seamless whole-home mesh Wi-Fi |
| Security Suite | AiProtection Pro powered by Trend Micro |
| VPN Support | VPN server and client capabilities |
| Adaptive QoS | Bandwidth prioritisation for gaming and streaming |
| Gaming Features | Open NAT, Game Boost |
| Firmware Stability | Improved with each update, some Qualcomm chipset bugs |
| Merlin Firmware Support | Not officially supported due to the Qualcomm chipset |
| Manual Firmware Flashing | Possible but not recommended for critical use |
| Price Range | $308.69 to $326.35 USD |
| Original MSRP | $449.99 USD |
| Use Case | Power users, tech enthusiasts, and small businesses |
| Security Features | WPA3, real-time threat detection, parental controls |
| Backup Compatibility | No universal backup with Broadcom-based Asus routers |
| Web Interface | Granular control, sometimes sluggish |
| Notable Limitations | No Merlin support, some bugs with specific Wi-Fi chips |
Asus RT-AX89X: Key Features and Specifications (in Table)
Asus RT-AX89X Firmware Overview
The Asus RT-AX89X is a flagship Wi-Fi 6 router known for its powerful hardware and advanced firmware. The latest official firmware, version 3.0.0.4.388_33744, was released in March 2025. This update focused on security improvements, better system stability, and bug fixes.
Notably, it enhanced input parameter handling and improved client connections and AiMesh stability. Asus regularly updates the RT-AX89X firmware, keeping it secure and efficient. The firmware supports modern features like WPA3 security, WAN aggregation, Dynamic DNS, port forwarding, and VPN server/client options.
However, because the router uses a Qualcomm chipset, it’s not compatible with universal backup and restoration across all Asus models, especially those using Broadcom chips. This means users may need to reconfigure settings manually when switching routers.
Pro Features of the Asus RT-AX89X Firmware
The RT-AX89X is built for advanced users and professionals. It supports Wi-Fi 6 (802.11ax) with speeds up to 6000 Mbps, using 8×8 5GHz and 4×4 2.4GHz streams. The router features dual 10G ports—one copper and one SFP+ fibre—for ultra-fast wired connections, ideal for NAS or high-speed internet.
There are eight Gigabit LAN ports, allowing many wired devices to connect at once. A robust Qualcomm quad-core CPU and 1GB RAM ensure smooth performance, even with demanding features like Intrusion Prevention. The router supports AiMesh, letting users create a whole-home mesh Wi-Fi system with other Asus routers.
AiProtection Pro, powered by Trend Micro, provides real-time security and parental controls. Adaptive QoS and gaming features help prioritise bandwidth for gaming or streaming. The web interface and Asus Router app offer detailed network management and monitoring, making the RT-AX89X a great choice for tech enthusiasts and small offices.
Firmware Stability and Performance Evaluation
The Asus RT-AX89X consistently earns praise for its impressive speed and dependable operation. During hands-on testing, it delivered Wi-Fi speeds well above 600 Mbps, with actual throughput often only limited by the bandwidth provided by the user’s internet service. Wired connections using the 10GbE ports can reach up to 850 MB/s, making it one of the fastest routers in its class.
Firmware stability has improved with each update. Recent versions have fixed issues like AiMesh backhaul disconnects and 160MHz channel instability. Some users still report occasional web interface slowdowns and rare compatibility bugs with specific Wi-Fi chips, but Asus is proactive in releasing beta fixes.
Security is a strong point for this router. Recent firmware updates have improved access control and input handling, reducing vulnerabilities. With WPA3 support and regular security patches, the RT-AX89X is a safe choice for sensitive environments.
Merlin Firmware Support
Asus WRT-Merlin is a popular third-party firmware that adds advanced features to Asus routers. Merlin does not officially support the RT-AX89X because it uses a Qualcomm chipset. Merlin mainly supports Broadcom-based Asus routers, and the RT-AX89X is not on the compatibility list.
Users interested in Merlin’s custom features should check the official Merlin website before attempting to install it. If you install unofficial firmware, you may lose features or experience stability issues, which makes it unsuitable for critical or mission-essential networks.
Asus equips its standard firmware with a wide array of powerful features. It delivers comprehensive VPN functionality, in-depth network activity logs, and a wide range of customisation settings, effectively serving the requirements of advanced users.
Value at a Glance
The Asus RT-AX89X is a premium router with a price to match. As of April 2025, it sells for around $308.69 to $326.35 in the US, down from its original $449.99 MSRP. This price drop makes it even more attractive, given its performance and features.
Standout Features and Flexibility
Compared to other high-end routers, the RT-AX89X stands out with its dual 10G ports and many LAN connections. Ideal for heavy network users, such as gamers, tech enthusiasts, and small business owners, the RT-AX89X delivers exceptional performance for demanding environments.
Versatility and Reliability
Moreover, the RT-AX89X stands out for its versatility, functioning as either a high-performance standalone router or integrating smoothly into an AiMesh system for expanded coverage. Although a few minor firmware quirks persist, Asus’s dedication to frequent updates and the router’s consistent reliability make it a top choice for users who value fast speeds, strong security, and advanced networking features.
Other Competing Models
Routers like the Asus ROG Rapture GT-AX11000 Pro and TP-Link Archer AX11000 offer tri-band Wi-Fi and additional LAN ports, but the RT-AX89X’s dual 10G ports and overall wired bandwidth are still rare in the consumer market.
The RT-AX89X excels as a network-attached storage (NAS) server when paired with a fast external drive, achieving top-tier read speeds via its 10 Gbps ports. Write speeds, while still fast, are not as high as those of some competitors, like the Netgear RAX120. However, the RT-AX89X remains a strong choice for users needing fast local file transfers.
The table below highlights the comparison of Asus’ different models:
| Feature | Asus RT-AX89X | Asus GT-AX6000 |
|---|---|---|
| Chipset | Qualcomm IPQ8074 (2.2GHz) | Broadcom BCM4912 (2.0GHz) |
| 5GHz Wi-Fi | 8×8 AX, up to 4804 Mbps | 4×4 AX, up to 4804 Mbps |
| 2.4GHz Wi-Fi | 4×4 AX, up to 1148 Mbps | 4×4 AX, up to 1148 Mbps |
| LAN Ports | 8 x 1GbE, 1 x 10GBase-T, 1 x 10G SFP+ | 4 x 1GbE, 2 x 2.5GbE |
| AiMesh Support | Yes | Yes |
| Security | AiProtection Pro | AiProtection Pro |
| Web Interface | Slower, often needs restarts | Faster, fewer restarts needed |
| Notable Bugs | MIMO/AX210 compatibility issues | Fewer chipset-related bugs |
| NAS Performance | Excellent (10GbE read speeds) | Very good |
Conclusion
To sum up, the Asus RT-AX89X firmware delivers an impressive blend of cutting-edge features, reliable performance, and ease of use. Ongoing firmware updates ensure the router remains secure, stable, and equipped with the latest enhancements. The built-in Asus firmware is robust enough to satisfy the demands of advanced users, offering strong security, VPN options, and flexible network management. Although the RT-AX89X does not support Merlin firmware, it still stands out as a smart investment for anyone who needs a fast, secure, and adaptable networking solution for home or professional use.
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Frequently Asked Questions (FAQS)
The ASUS RT-AX89X WiFi 6 router delivers blazing speeds of 6000 Mbps, split as 1148 Mbps on 2.4GHz and 4804 Mbps on 5GHz. With dual 10 Gbps ports, it ensures exceptional wired connection performance.
The ASUS RT-AX89X router includes two 10 Gbps ports (one Base-T and one SFP+), eight Gigabit LAN ports, a Gigabit WAN port, and two USB 3.1 Gen 1 ports, offering a range of connectivity options.
The ASUS RT-AX89X is powered by a 2.2GHz quad-core processor with 1GB of RAM and 256MB of flash memory. It features eight external antennas for strong signal coverage and supports dual-band WiFi 6. Additionally, it includes two 10 Gbps ports (Base-T and SFP+), eight Gigabit LAN ports, and two USB 3.1 Gen 1 ports for versatile connectivity.
