How The Radeon OpenGL Performance Has Evolved From The HD 2900XT To RX Vega
The GpuTest triangle sub-test is largely limited by video memory performance and shows the RX Vega 56/65 coming in line with the R9 Fury even though these new graphics cards are backed by HBM2 memory.
The performance-per-Watt of the Vega cards were aligned with the R9 290 and HD 6870.
Some more synthetic OpenGL test cases via GpuTest.