This message was posted on behalf of Intel Corporation
I apologize for the delay.
Please refer to the following link Intel® Xeon® Processor E3-1200 v3 Family: Datasheet, Vol. 1, the difference is that DMI2 doubles the data transfer rate to 2 GB/s with a ×4 link. This family does support DMI2 and it can go up to 5GT/s.