System board connections
Refer to the following illustration and table to identify the system board connectors for your model.
Item System board connector System board label Color Component
1 PCI Express x1 X1PCIEXP3 black Expansion card
2 PCI Express x1 X1PCIEXP2 black Expansion card
3 PCI Express x1 X1PCIEXP1 black Expansion card
4 PCI Express x16 X16PCIEXP black Expansion card
5 SATA 3.0 SATA0 dark blue Primary hard drive
6 SATA 3.0 SATA1 light blue Any SATA device other than the primary
hard drive
7 DIMM4 (Channel A) DIMM4 white Memory module
8 DIMM3 (Channel B) DIMM3 black Memory module
9 DIMM2 (Channel A) DIMM2 white Memory module
10 DIMM1 (Channel B) DIMM1 black Memory module
11 SATA 3.0 SATA2 light blue Any SATA device other than the primary
hard drive
12 SATA 3.0 SATA3 light blue Any SATA device other than the primary
hard drive
13 Battery BAT black Battery
14 M.2 WLAN 2230 WIRELESS black M.2 WLAN card
15 M.2 SSD card SSD1 black M.2 SSD storage card
System board connections 25
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