MiniPCI Express slot

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A MiniPCI Express slot is a version of the PCI-Express x1 slot for Notebooks.

There are two physical form factors, a standard 30×50.95 mm, and a half-height 30×26.8 mm. Which one fits depends on the slot.

Models featuring MiniPCI Express slots

MiniPCI Express Adapters





Designated slots

According to the design, each slot is intended for a specific purpose. In the X200 for example, the three slots are for:

  • Wireless USB or the Intel SSD cache (half-length slot)
  • WWAN 3G mobile phone network access (full-length)
  • WLAN card (full-length)

The purpose of each slot decides over:

  • antenna cable routing (or placement of other connectors)
  • details of some pins of the MiniPCI Express connector
    • RF kill signal
    • LED signal lines
    • SIM card slot access

BIOS checks

The BIOS is know to check PCI IDs (via whitelist) and block the boot process if it’s not satisfied (1802 error). The details vary. Above mentioned hardware might only be accepted if it comes with one set of possible IDs (for Lenovo). The same hardware (from the driver’s viewpoint) is often also available with other IDs if it is sold though other channels. (see also Problem with unauthorized MiniPCI network card, 1802 with MiniPCIe on t60,same).

Non-official patched versions of BIOS files are available for X300, X61, X61s, T61, T61p, R61, R61e (and others, i did it to x60s) which remove whitelist restrictions allowing non-lenovo PCI-e devices.. (see forum post: Ultimate R61/T61/X61/X300 BIOS (inc SATA-II)

External sources