At 1600Mhz it means this card has 13.1 TFLOPS, compared to stock 1080Ti of 10.6 TFLOPs; which isn't bad. Although seeing 16GB HBM2 makes me think this might be an Instinct or Radeon Pro cards, not Radeon RX.
HBM2 is hella expensive, who knows though.
If this is a Instinct of Pro then that bodes well for the RX Vega cards since the pro cards are usually lower clocked. A 1600MHz Fiji would be between a 1080 and 1080Ti and Vega is supposed to be much improved architecture. If this leak is true then even the low end Vega should be 1600MHz or more which is exciting.