Got my PowerColor Red Devil RX VEGA 64. Tested it at stock settings with Firestrike Ultra (4K) and standard Time Spy (2K monitor setting).

80+ percent faster than my stock, Reference RX480 8GB. That's a very satisfactory improvement by my standards.

Runs at 260 W during bench marking. Runs at 8 W for normal desktop stuff. Doesn't get very hot during benchmarks.

My card's performance in the benchmarks is equivalent to on-line GTX 1080 results. The GTX 1080 Ti on-line results are about 25 percent faster than my results with my PC (as Paradaz suggested). My Vega card ran at base frequency (not boost frequency) during test.

I'm happy getting it for $590 (now $725 -- too much). But, folks with no urgent need should wait for the new Nvidia models and the AMD 7nm GPUs rumored for 2019. Being me, I'll buy a 7nm when it arrives next year -- if the price is right.