Does the server board S1400FP2 has an onboard RAID controller?
If it has an onboard RAID controller is it activated on default or do i need a RAID product key (for RAID1) ?
If it has an onboard RAID controller is it supported by Windows 2012 , so can I create a RAID set and install Windows 2012 on the RAID set (do i need to load drivers) ?
The answer to your basic question is yes the S1400FP2 has onboard RAID. In fact, two types, RSTe and ESRT2. I suggest checking the Intel® Server Board S1400FP Family support site for a wealth of information. Specifically the Technical Product Specification for the S1400FP2 and the Intel® RAID Quick Reference Guide.