This new driver release brings support for AMD's latest Radeon 300 series and previous Radeon GPUs under one roof. Which were previously bifurcated to two non-crosscompatible driver releases, 15.15 for the 300 series and 15.5 for previous graphics cards. Interestingly, because the new 15.7 drivers are compatible with all of AMD's graphics cards ' except legacy products ' it also enables CrossfireX compatibility between 300 and 200 series graphics cards based on GCN GPUs that feature identical configurations ( identical GCN core counts, texture units, ROPs etc ). For example the R9 380 should now be compatible with the R9 285, the R7 370 with the R7 265 and the R9 390 series with the R9 290 series. The differences in GPU core and VRAM clock speeds may produce varying results however.