We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green circuit board with silver PCIe connector and two black antenna ports

SIIG, Inc

SIIG, Inc CN-WR0811-S2 PCIe Wi-Fi adapter 300 Mbps

SKU CH-Z7C7-H3T8T MPN CN-WR0811-S2

A PCI Express Wi-Fi adapter adding 2.4 GHz wireless‑n connectivity to a desktop at up to 300 Mbps

  • Interface typePCI Express, 32-bit
  • Radio bands2.4 GHz - 2.483 GHz
  • Audio channels11 for 802.11b, 802.11g, draft 802.11n (20 MHz) 7 for draft
  • Product typePCIE Wi-Fi Adapter
  • Key featuresComplies with 2.4 GHz IEEE 802.11 b/g/n standards 2 × 2 MIMO
  • Product dimensions4.72 in × 0.79 in × 3.07 in
  • PCI Express interface fits standard desktop slots
  • 2×2 MIMO on 2.4 GHz band improves reception
  • Up to 300 Mbps with 40 MHz channel width
  • Low-profile 4.72″ × 0.79″ card suits compact cases
  • RoHS and WEEE certified for reduced environmental impact

Desktop PCI Express Wi-Fi adapter

The SIIG CN-WR0811-S2 is a new internal wireless adapter for desktop computers that use a 32-bit PCI Express slot. It operates on the 2.4 GHz band and supports IEEE 802.11 b/g/n standards with 2x2 MIMO technology. Maximum data rates reach 150 Mbps on 20 MHz channels and 300 Mbps on 40 MHz channels.

Simple installation with antenna clearance

The card inserts into an available PCI Express slot and includes external antennas that screw onto the bracket. The low-profile bracket measures 0.79 inches wide, so it fits slim cases, but the antennas need rear clearance to rotate. Driver installation follows the standard Windows path; no extra power connector is required.

Steady throughput on the 2.4 GHz band

Under sustained load the adapter maintains the 2x2 MIMO link at up to 300 Mbps when the router uses 40 MHz channels, dropping to 150 Mbps on 20 MHz channels. Performance is limited to the 2.4 GHz spectrum, so heavy neighbouring traffic can reduce real-world speed during long transfers.

How it compares

Measured against everything we stock in Wi-Fi Cards & USB Adapters, at today’s prices. Recalculated every night.

Price $25.99
Pricier than about 65% of the 1,565 comparable items (median $18.99).

Specifications

Product
Brand nameSIIG
Model nameCN-WR0811-S2
Product typePCIE Wi-Fi Adapter
Audio & video
Audio channels11 for 802.11b, 802.11g, draft 802.11n (20 MHz)
7 for draft 802.11n (40 MHz)
Connectivity
Radio bands2.4 GHz - 2.483 GHz
Ports & slots
Interface typePCI Express, 32-bit
Size & build
Product dimensions4.72 in × 0.79 in × 3.07 in
Product weight0.12 lb (0.05 kg)
Shipping weight0.18 kg
Package size203 × 127 × 32 mm

Questions about this item

How do I confirm the CN-WR0811-S2 is delivering the 300 Mbps link speed after installation?

In Windows Device Manager check the adapter properties; the link speed should read 300 Mbps when connected on the 40 MHz channel.

What comes in the box with the CN-WR0811-S2 and what must I purchase separately?

The box contains the PCI Express 32-bit adapter and a low-profile bracket; you must supply your own 2.4 GHz antenna if not already fitted.

Should I choose the 20 MHz or 40 MHz channel setting for the CN-WR0811-S2?

Use the 40 MHz setting to reach the 300 Mbps maximum rate; select 20 MHz only if you need the 11-channel layout for compatibility.

More in Wi-Fi Cards & USB Adapters

Similar items