We got three mainboards X8SIE-LN4F two weeks ago. Two of the boards are working fine. By the third board, we have problems with all four LAN interfaces (very low data throughput, dropouts etc.) both with Windows 2000 R2 Server as well as with VMware. So we added a Ethernet Card (Intel Dual Port PCI Express Server Adapter). The problems are the same. Do you have any idea ?
Please change BIOS setting for "Active State Power Management" to disable. also update BIOS to latest version from Supermicro website.