Version Found: MIG 7 Series v1.7
Version Resolved: See (Xilinx Answer 45195)
New calibration updates are required for MIG 7 Series DDR3 designs due to potential calibration failures across process variation or continuous resets. This answer record details the calibration updates and includes links to patches for both MIG 7 Series v1.7 and v1.8 designs. Moving to v1.8 is recommended but not required as long as the v1.7 patch from this answer record is applied.