A Guide to Mini-PCI Laptop Wireless Cards

A comparison of the three current standards for laptops and notebooks

This is just a brief overview of the differences between the three major types of internal wireless (WLAN) adapters found in modern laptops. We won’t get into details like different chipsets or connection speeds, just the physical differences in form factor.

Wireless Cards Side by Side

Mini-PCI, PCI Express Mini, PCI Express Micro

The Short:

The oldest wireless capable laptops use Mini-PCI (Type IIIa), while laptops released after about 2005 use PCI Express Mini, also known as Mini-PCI Express or Mini-PCI-e. The newest laptops use the PCI Express Micro or sometimes called Half-Height PCI Express Mini.

How Old is Old?

Mini-PCI can be found on pretty much all laptops with built-in wireless networking made before 2005. Many computers that are now too outdated to have included built-in wireless at the time of purchase may still have a Mini-PCI slot, but this was used for 56K modem cards. Laptops produced after 2005 start to begin using PCI Express Mini. Today in 2012, arguably all new laptops make use of PCI Express Micro.

Show Me the Difference

It’s no surprise that the older cards are larger than the new ones.  Below is an older Mini-PCI wireless adapter. It has 124 pin edge connection and an overall square shape. These cards are capable of 802.11g and 802.11b wireless LAN connection speeds.

Mini-PCI wireless adapter

Mini-PCI wireless adapter

Next we have pictured a newer PCI Express Mini card. It has a 54 pin edge connection and a rectangular shape. These cards support 802.11a/b/g/n wireless LAN connections.

PCI Express Mini card

PCI Express Mini card

And finally the PCI Express Micro (Half Height) which has a 52 pin edge connection and is roughly half the size of the PCI Express Mini card. These cards support 802.11a/b/g/n wireless LAN connections as well.

 

PCI Express Micro Wireless Card

PCI Express Micro Wireless Card

How Do I Know For Sure Which One I Need?

For starters, we’ve identified the correct type of card for thousands of laptop models within our database, so the easiest way is to browse parts for your laptop model by clicking your brand at the left. If we don’t have your model listed, you can look around the web for the answer, or do a visual check in your laptop.

Where Do I Install or Replace the Card?

We recommend first visually checking where your card is located, for several reasons. Most laptops have the card easily accessible from under a cover panel on the base of the laptop. However, there are a few models that require removing the keyboard or some disassembly to get at the card. Second, you should verify that wireless antenna cables are hooked up to your existing card, or are dangling near where the card belongs. Some older models were purchased without wireless networking capabilities would need new antenna cables to be retrofitted inside the computer.

58 Comments to “A Guide to Mini-PCI Laptop Wireless Cards”

  1. […] Original post: A Guide to Mini-PCI Laptop Wireless Cards « Machinablog […]

  2. fidel says:

    hol pueden poner las especificciones de cda pin de una mini pcie,wireless card, ya que no tengo esa informacion, y si tienen informacion acerca de como o cual pin se puede conectar directamente a la usb

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  6. msg says:

    What about pci adaptors between these wireless card types?
    i.e. pci mini to pci express mini. Or pci mini to pci express micro, or pci express mini to pci express micro?

    That what I one can get an old mini pci with the pci express micro wireless card and get todays speeds.

  7. Rebean says:

    Hello, my laptop wlan adapter has broken. I want to get a new one. And im worried about two things:
    1- how do i know which antenna plug should be plugged into the adapter(white/black) wires.
    2- do i face broblems with drivers?

  8. Samir says:

    Very useful guide! I actually was mixing up mini pci express and mini pci and almost bought the wrong network card! Thank you!

  9. This is amazing guide to make Mini PC wireless card at home.

  10. This is nice post.I really was stirring up smaller than usual pci express and little pci and nearly purchased the wrong system card.Thanks for this blog

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