Verified compatibility answer

What multi-gig Ethernet ports does ASUS RT-BE88U have?

ASUS specifies dual 10G ports, four 2.5G ports and four Gigabit ports for RT-BE88U. That mixed port layout means the physical jack selected can be the limiting factor in a wired speed test.

CompatibleVerified 2026-08-11

Why this answer matters

A high-end Wi-Fi 7 router can still show a Gigabit ceiling when the endpoint is intentionally connected through one of its 1-Gb/s ports.

2 requirements3 verification steps1 primary source

Requirements

What has to be true

  • Use the correct 10G or 2.5G interface for a multi-gig endpoint.
  • Client NIC, cable, switches and upstream WAN equipment must support the same rate.

Verify it yourself

Use this test sequence

Change one variable at a time so you know which requirement made the difference.

  1. 1

    Identify the exact port from ASUS's rear-panel/specification guide.

  2. 2

    Check negotiated link speed on the endpoint and any intermediate switch.

  3. 3

    Test direct to the relevant router port before investigating applications or DNS.

Limits

What this answer does not prove

  • ASUS's up-to-7200-Mb/s Wi-Fi class is not a wired-port speed and not a guaranteed single-client result.
  • 10G copper/SFP+ topology and transceiver compatibility require the exact ASUS documentation for the interface used.

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