I am having a pretty good experience overall with my 5700 XT.
I do suffer from the downclocking issue in certain games, the main culprit being in DCS. I notice the card lowering its clockspeeds a lot, and in very rapid succession, often causing stuttering and lag spikes. Is there any way to force a constant clock speed that anyone has discovered yet?
And no, it is not a CPU or Memory bottleneck. I am running on a 9600KF with 16gb of 3200mhz ram and have monitored usage of both with no qualms. I simply need a method of forcing the card to maintain a constant clock speed.