Set up settings as instructed then went in Capture the Flag arena to test as follows:
Using a XFX BE Radeon R9 290X vid card:
Flying low over the terrain I noticed some very faint microstuttering (you had to look close to pick it up) w/ FPS running between 74-85. Out over the water all smoothed out w/ FPS between 192-220. Once over the terrain & went up in alt all smoothed out w/ FPS between 174 (during manoevering) to 365 (looking up into the sky).
Took a snippet of my vid card's vitals after flying this test cycle & this may explain the microstuttering:
As you can see, the Alpha is putting a LOAD on this vid card w/ the settings as currently set!
100% GPU usage, full GPU clocks, full mem clocks, GPU temps at the 90*C mark w/ fan speeds @ 95%-100%
Reminds me of Scotty in the Star Trek series......"That's all she's got, Captn!"
PS--Here is a good example of how AMD PowerTune 2.0 will perform if you allow the GPU to heat up as close to the 95*C threshold as the AMD engineers said to do as they stated that this Hawaii GPU is built to run consistently at this temp, but it's AB's fan profile that makes the difference along w/ XFX's DD cooling solution as you cannot get 100% fan speed from AMD's OverDrive (max is 55% & PowerTune would have throttled the GPU back making the stutters worse).
Yes, this is a tough concept to swallow but it does work as it was intended. If I had v-synch enabled you wouldn't see this as v-synch won't allow the card to run flat out due to my monitor (60Hz refresh=60 FPS max) & so the GPU won't be pushed as hard. This is something to keep in mind w/ an AMD Radeon R9 series vid card w/ a monitor's RR >60 Hz being used w/ this Alpha.............
Putting this out there for reference....................
.
Another PS--Using Cat 15.7.1 WHQL drivers w/ reduced Flip Query Size setting (same as Nvidia # of CPU frames before GPU rendering starts...helps w/ control input lag & speeds things up a little).