Advantech ASMB-820I User Manual page 52

Data Scrambling
Enable/Disable data scrambling
Device Tagging
Enable/Disable device tagging
IOH Configuration
 Intel I/OAT
Enable/Disable Intel I/O Acceleration Technology function.
 DCA Support
Enable/Disable Direct Cache Access Support
 VGA Priority
Determines priority between onboard and 1st offboard video device found.
 IOU 0 PCIe port Bifurcation control
IOU1 - PCIe Port(PCIEX16_SLOT4)
Functions visible based on this setting : x4x4, x8,
PORT 2A Link Speed
Select Target Link Speed Gen1, Gen2, Gen3
IOU3 - PCIe Port(PCIEX16_SLOT6)
Functions visible based on this setting : x4x4x4x4, x4x4x8, x8x4x4, x8x8,
x16PORT 3A Link Speed
Select Target Link Speed Gen1, Gen2, Gen3
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