It uses their P100 HPC cards instead of consumer grade cards (8x P100s), plus two Xeon E5v4 chips, half a TB of RAM and 7.5 TBs of SSD storage - all wrapped up nicely configured for you with their CPU-GPU speed up stack.
I believe the only way to get P100s right now is in the DGX-1, so there's that.
It uses their P100 HPC cards instead of consumer grade cards (8x P100s), plus two Xeon E5v4 chips, half a TB of RAM and 7.5 TBs of SSD storage - all wrapped up nicely configured for you with their CPU-GPU speed up stack.
I believe the only way to get P100s right now is in the DGX-1, so there's that.