Advantech SIMB-982 User Manual page 26

2.13 PCI-E x16 Slot (PCIE_SLOT1)
PCI-E x1 Slot (PCIE_SLOT2 / PCIE_SLOT4)
PCI-E x4 Slot (PCIE_SLOT3)
SIMB-982 provides a PCIe x16 slot and PCIe x4 and PCIe x1 slot for users to install
add-on cards when their applications require higher graphic performance than the
CPU embedded graphics controller can provide.
Note! When PCIe x8 slot is used, PCIe x16 slot only supports x8 bandwidth
automatically.
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