TechPowerUp posted a review on the AMD Radeon RX Vega Put Through 3DMark
A quote from the article:
Ahead of its July 27 unveiling at AMD's grand media event on the sidelines of SIGGRAPH, performance benchmarks of the elusive Radeon RX Vega consumer graphics card surfaced once again. Someone with access to an RX Vega sample, with its GPU clocked at 1630 MHz and memory at 945 MHz, put it through 3DMark. One can tell that it's RX Vega and not Pro Vega Frontier Edition, looking at its 8 GB video memory amount.AMD Radeon RX Vega Put Through 3DMark @ TechPowerUp
In three test runs, the RX Vega powered machine yielded a graphics score of 22,330 points, 22,291 points, and 20.949 points. This puts its performance either on-par or below that of the GeForce GTX 1080, but comfortably above the GTX 1070. The test-bench consisted of a Core i7-5960X processor, and graphics driver version 22.19.640.2.