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Small green circuit board with gold edge connector and two antenna sockets

IBM

IBM 42T0873 Intel 4965AG Wi-Fi adapter

SKU CH-B122-S40FZ

Adds Intel 4965AG wireless to ThinkPad T61, R61 or X61 laptops via M.2 slot

  • TypeM.2 Wi-FI Adapter
  • Fits ThinkPad T61, R61 and X61 models
  • Intel 4965AG chipset provides wireless connectivity
  • M.2 form factor installs in compatible slots
  • Genuine IBM part number 42T0873 ensures compatibility
  • New condition, ready for immediate installation

IBM 42T0873 Wireless Adapter for ThinkPad

This IBM 42T0873 adapter provides wireless connectivity for the ThinkPad T61, R61 and X61. It is a new M.2 Wi-Fi card designed to replace a missing or damaged module in those models. The package includes one card that matches the listed part number. Buyers receive any compatible part number that works with the specified systems.

Thermals noise and power draw in normal use

The adapter draws minimal power during typical wireless activity and adds no audible noise to the laptop. Heat output remains low under everyday browsing and office tasks. No active cooling is required on the card itself. Normal operation stays within the thermal limits of the supported ThinkPad chassis.

Behaviour under sustained load

During extended file transfers or streaming the card maintains a stable connection without throttling. Temperatures rise slightly but remain within the design envelope of the T61, R61 and X61 platforms. The module does not require additional airflow beyond what the laptop provides. It is not suited for systems outside the listed compatibility list.

Highlights

  • Fits ThinkPad T61, R61 and X61 models
  • Intel 4965AG chipset provides wireless connectivity
  • M.2 form factor installs in compatible slots
  • Genuine IBM part number 42T0873 ensures compatibility
  • New condition, ready for immediate installation

Specifications

TypeM.2 Wi-FI Adapter

Questions about this item

How do I install the 42T0873 card in a ThinkPad T61 without damaging the antenna connectors?

Power off the laptop, remove the battery, open the Mini‑PCIe cover, align the keyed edge of the card with the slot, press down firmly until it clicks, then snap the two U.FL antenna leads onto the gold posts labelled MAIN and AUX.

What part will need replacement first if the 4965AG adapter loses signal after several years?

The two U.FL antenna cables inside the display lid tend to fatigue from repeated lid opening; replacing the cable set restores full reception.

Which thermal limit appears first when the 42T0873 runs at full throughput for long periods?

The card’s own radio controller reduces transmit power once its internal temperature threshold is reached, protecting the silicon before the laptop chassis becomes a bottleneck.

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