Version Found: MIG 7 Series v1.6
Version Resolved: See (Xilinx Answer 45195)
When targeting a 48-bit DDR3 interface, it is possible to fit this into two HP banks. However, when targeting the xc7k70t, the MIG 7 Series Bank Selection page prevents the interface from being placed into two HP banks while retargeting to a larger part allows this configuration.
To work around this issue, generate a MIG 7 Series design targeting the larger device with the same package type, then generate a MIG 7 series design targeting the xc7k70t using Fixed Pin Out mode in the interface, and import the UCF pinout from the larger device.
10/16/2012 - Initial release