My motherboard is the X9DRL-3F. There are two unknown devices, "PCI Simple Communications Controller," found in Windows 2008 R2 device manager. I had installed the chipset driver, and any other driver I could download for this motherboard. It still doesn't have the driver loaded. Where can I find the driver for them?
Please double-click on these two unknown devices in Device Manager. In the new windows, go to the Details tab to check the hardware ID. If it's PCI\VEN_8086&DEV_1D3A or PCI\VEN_8086&DEV_1D3B, it's the Intel Management Engine Interface. Please download below driver or newer driver in the same FTP folder to install.
https://www.supermicro.com/wdl/driver/Intel_ME/SPS_MEI_DRV_9.4.0.1005.0_PV-BR_CPT_R_PBG_REL.zip