I'm trying to identify the appropriate connector for this bundle of unterminated contacts, from my HP Stream 14 motherboard.

I'm talking about the red circled part of the motherboard: enter image description here

Here's a close up: enter image description here

The number of contacts are:

\$4 \qquad\qquad 29\$

\$5 \qquad\qquad 29\$

The first picture, with unsoldered contacts, was pulled from the internet. The second picture is of my actual motherboard.

The reason for asking is that the Intel Celeron embedded on this motherboard (https://ark.intel.com/products/91832/Intel-Celeron-Processor-N3060-2M-Cache-up-to-2_48-GHz) supposedly has

4 PCIe lanes
1 DisplayPort/HDMI (integrated graphics in CPU)
5 USB ports (some 2.0, some 3.0)


The screen uses the DisplayPort/eDP.
The physical HDMI port is most likely in dual-mode with the DisplayPort above.
There are physically 2 USB 3.0 and 1 USB 2.0 ports
The keyboard might take up either a USB or the UART or the GPIO.
The trackpad might also take up  a USB or the UART or the GPIO.
The M.2 slot uses 2 of the PCIe lane.

So really, there are more or less:

2 PCIe lanes made unavailable
0 to 2 USB ports (some 2.0, some 3.0) made unavailable
2 SATA made unavailable
0 to 1 UART made unavailable 
0 to 1 GPIO made unavailable

So perhaps some of the unavailable lanes above are on the unterminated contacts?

How do I test?

But really, the easier way of going about this is identifying the connector.

  • 1
    \$\begingroup\$ Looks like mini PCIe. \$\endgroup\$
    – Wesley Lee
    Apr 10, 2018 at 3:48
  • 2
    \$\begingroup\$ What does empotted mean? \$\endgroup\$ Apr 10, 2018 at 4:49

1 Answer 1


That looks like a footprint for an M.2 connector (though not the exact one in the picture below). Specifically, it looks like an "M key" connector, so it could be connected to a PCIe interface and/or a SATA interface. They are often used for things like SSDs and Wi-Fi cards.

M.2 connector


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