Lan1 is (The one closest to your VGA connector) is used for IPMI.
"The X7SPA-L, X7SPA-H, X7SPA-HF, X7SPE-H and X7SPE-HF supports up to
4GB of unbuffered Non-ECC DDR2 SODIMMs (667/800 MHz in 2 SO DIMM
slots)" Manual
There is a 4 pin power connector on the mobo by the sata slots. Do NOT connect your PSU to this port. That port is for power exiting the mobo. So example is powering your SSD from the mobo.
http://www.supermicro.com/manuals/motherboard/ICH9/MNL-1166.pdf
Page 2-24 will tell you how to enable your Lan1 port
Page 2-25 will tell you how to clear your CMOS
Page 2-29 will tell you how to enable your VGA
Page 4-2 will show you your BIOS. (So you maybe be able to do it (Blind))
To enter Bios hit your Delete Key
The IPMI setting under the BIOS is under Advanced tab