I think he is talking about variation in frame rate, not micro-stutter. What he is describing is inconsistent frame-rates (quick increases and drops in frame rate,) during a 3d scene on an AMD card. The problem is there are settings that can be adjusted to improve this. This usually happens because no frame are being pre-rendered on the AMD card when nVidia defaults to something like 3 frame. RadeonPro lets you adjust this for AMD cards.
That's interesting. Although I'd dare say that this condition may have a lot to do with the game being played as opposed to the hardware that it's being played on. Some games have poorly coded/textured maps that will cause unexplainable drops/increases in FPS. I've seen a lot of games do this.
Having two 6870s in crossfire, I do notice micro-stuttering, but it doesn't bother me most of the time.
That's quite strange. I've ran several crossfire getups since the 4870 was king, including several 58xx series cards, 6870's, 6950's and 6970's, I can't say that I've noticed microstuttering with any of them.
Some of these getups, mainly the 58xx series cards and the 6950's I've run on an i7 (x58) and an AMD rig (1090T, 790FX), while the framerate was better on the i7, there still weren't any issues on the AMD either.
The 6870's I ran on the AMD rig, and they ran flawlessly with the exception of Skyrim, which is a known issue.
From what I've observed, when microstutter occurs with relatively current hardware in crossfire using 2 separate GPUs', there typically is another fairly resource heavy program running in the background.
Don't get me wrong, a lot of the x2 iterations of cards had their fair share of issues, however, that was almost 5 generations ago.
Just out of curiosity, how many programs are running int he background?
It can default to 10. I dont really care until unless my gaming experience is being ruined (see: Mouse lag).
There's other things that can cause mouse lag.
Vsync, believe it or not, on certain games can cause mouse input lag. I've especially noticed this on Valve games (CS:S, TF2, etc).
A resource heavy program running in the background; typically a lack of memory issue.
GPUs' can cause this issue, but I'd imagine that this is only at higher resolutions or extrememly damading games played on insufficient hardware.
Like trying to play Metro 2033 maxed out on a 6770. It's just not going to happen. Well it may, but it'll most likely look like a slide show.
I know a lot of people don't like ATi's GPUs' because they claim their drivers are poor. While sure the user interface isn't as user friendly as Nvidia's, it's typically not what people claim it is. More often than not it's the users fault. PEBKAC.
I've run ATi GPUs' for quite some time and I have never experienced problems that a lot of people have had with them.
I believe the problem here lies with the ambiguous form of installing/uninstalling ATi's driver. This, AMD could
GREATLY improve upon. Make it semi foolproof. I believe that is what's lacking.