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Green PCB PCIe card with gold edge connector, two detachable antennas on a square magnetic base, and a low-profile bracket

Cudy

Cudy WE4000 AX5400 WiFi 6E PCIe network card

SKU CH-2X9H-4QY69

Adds Wi-Fi 6E tri-band connectivity with 6 GHz support via PCI-Express, including detachable antennas and a magnetic base

  • Interface typePCI-Express
  • Wi-Fi standardWi-Fi 6
  • Radio bands2.4 GHz / 5 GHz / 6 GHz
  • Wireless speed6 GHz Wi-Fi Speed: 2,402 Mbit/s 5 GHz Wi-Fi Speed: 2,402 Mbi
  • Temperature rangeAmbient Operating Temperature: 0 °C to 70 °C (32 °F to 158 °
  • Humidity range10% ~ 90% non-condensing Storage Humidity: 5% ~ 95% non-cond
  • Wi-Fi 6E adds a 6 GHz band for less congestion
  • Tri-band speeds up to 2402 Mbps on 5 GHz and 6 GHz
  • PCI-Express interface fits standard desktop expansion slots
  • Detachable antennas with magnetic base allow flexible placement
  • Low-profile bracket included for compact chassis builds

PCIe Wi-Fi 6E adapter

The Cudy WE4000 installs in a PCI-Express slot to add tri-band wireless networking to a desktop PC. It supports the 6 GHz band alongside 2.4 GHz and 5 GHz for reduced congestion. The package includes detachable antennas, a magnetic base, a low-profile bracket and a Bluetooth header cable.

6 GHz band practical limits

The 6 GHz radio delivers up to 2402 Mbps link speed but requires a compatible router and client device. Range is shorter than lower bands and walls attenuate the signal more heavily. Regulatory limits on transmit power also cap real-world throughput below the nominal rate.

Tri-band capacity and headroom

Combined peak rates reach 5400 Mbps across the three bands with 2402 Mbps on each 5 GHz and 6 GHz channel plus 574 Mbps at 2.4 GHz. The card handles multiple simultaneous streams for gaming or 4K streaming. It runs out of headroom when the 6 GHz backhaul is absent or client devices lack Wi-Fi 6E support.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $39.99
Cheaper than about 75% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameCudy
Model nameWE4000
Connectivity
Wi-Fi standardWi-Fi 6
Radio bands2.4 GHz / 5 GHz / 6 GHz
Wireless speed6 GHz Wi-Fi Speed: 2,402 Mbit/s
5 GHz Wi-Fi Speed: 2,402 Mbit/s
2.4 GHz Wi-Fi Speed: 574 Mbit/s
Ports & slots
Interface typePCI-Express
Size & build
Product dimensionsDevice Body: 3.35 in × 2.42 in × 0.85 in
Magnetic Antenna Base: 3.72 in × 3.72 in × 8.72 in
Product weight3.53 oz
In the box
In the boxWE4000
Detachable Antennas
Magnetic Antennas Base
Bluetooth to 9-PIN USB Cable
Low-Profile Bracket
Installation Guide
Environment & compliance
Temperature rangeAmbient Operating Temperature: 0 °C to 70 °C (32 °F to 158 °F)
Storage Temperature: -40 °C to 70 °C (-40 °F to 158 °F)
Humidity range10% ~ 90% non-condensing
Storage Humidity: 5% ~ 95% non-condensing

Questions about this item

Should I pick the 2.4 GHz, 5 GHz or 6 GHz band for my Cudy WE4000 AX5400?

The card supports all three bands simultaneously; your router and client devices negotiate the best link, with 6 GHz delivering up to 2402 Mbps when both ends support Wi-Fi 6E.

What does the AX5400 label mean for real-world throughput on this card?

AX5400 sums the peak PHY rates — 574 Mbps on 2.4 GHz plus 2402 Mbps on each of 5 GHz and 6 GHz — actual sustained throughput will be lower due to overhead, distance and interference.

Does the PCI-Express interface limit the 2402 Mbps 6 GHz speed in practice?

A single PCIe lane provides far more bandwidth than 2402 Mbps, so the slot does not cap the wireless link; the 6 GHz radio itself is the bottleneck.

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