With my new 5700G when running Blender Classroom Render along with Unigine Valley, Blender will give a time out error after about 5 minutes. I also tried CPU-Z stress test also with Unigine valley and again got a timeout after 5 minutes. This was with the latest drivers installed. I have made 2 bug reports to AMD. The 5700G took over 1 minute less than the 4750G to complete the Blender Classroom render - the one time it was able to complete the render without a timeout.