The R9 285 is the same GPU like the R9 380 while the R9 290 is the same GPU like the R9 390, the new ones just have a higher clock and more VRAM. So all issues which affect the 380/390 will also affect the 285/290.
The R9 285 is the same GPU like the R9 380 while the R9 290 is the same GPU like the R9 390, the new ones just have a higher clock and more VRAM. So all issues which affect the 380/390 will also affect the 285/290.