I don't get this, I bought this graphics cards a month ago, we tried so many things already.
The drivers were installed through the AMD support site, which gave us two options: 18.2.1 and 18.3.4. Later I installed it via CD and it was 17.10
When the card was installed for the first time with the 18.2.1 driver, it always had crashes with a white screen. As this happened we thought it would be the wrong driver and 18.3.4 was installed, where the screen crashes were black or white, and once with many colors on it. Later with the CD we installed the 17.10 and it crashed to a gray screen, probably because I was on discord. This crashes are always random, I can be browsing, listening to music, seeing youtube videos, watching a movie, etc.
The PSU was tested with a multimeter and all measurements were correct. So energy doesnt seem to be the problem.
The graphic card never crashes during the stress tests.
We already sent it back to the shop because we though it might be broken but they say everything is working just fine. We also did tried in another computer and it crashed 6 time in one hour. I don't know what is it we are doing wrong.