What is below? Above?

The Mid-range server line is differentiated from the “entry-level” server line (up to the V880) by higher internal (memory) bandwidth, better RAS, greater expandability.
The “High End” servers (E12000, E15000) allow further scalability (up to 106 CPUs), higher bandwidth (172 GB/s), better RAS

Yes, that really is 18 times as fast!

The Mid-range server line is differentiated from the “entry-level” server line (up to the V880) by higher internal (memory) bandwidth, better RAS, greater expandability.