Is this microstutter? Or..?

S

sonsonate

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For poops and giggles I got back into Metro2033 -- haven't played it much since changing my processor and then now, with the new 680s. I jumped back in to see if it was any smoother than before.

So first thing I see is that it's just about locked at 60FPS, except in those indoor scenes with light shining in, then it drops to 30FPS (@ Vhigh, 2560*1440, AAA, 4xAF with no DOF/Tess) I do, however, notice some hitching at 4.2GHz while playing even when the EVGA overlay is claiming 50-60 FPS, so I decided to bench at 1920*1080 (compare my old FPS on my basically all upgraded comp) and got this:

http://imgur.com/a75Xt @ 4.2GHz

and:

http://imgur.com/x2Bmj @ 4.7GHz

Does this show the fabled microstutter? Or is this something else?
 
sonsonate said:
Does this show the fabled microstutter?
Click to expand...
Maybe the 120-220fps fluctuations past the 45 second mark, but not the random spikes down to 25fps. Microstutter is more consistent - you'd be seeing the spikes every second frame. Also, you wouldn't be dipping any lower than 50% of your average framerate.
 
Microstutter is better measured when you look at the frames in a single second, instead of 0-60 seconds as you do here. You're not looking for frame drops as much as you're looking for frames taking a varying amount of time to create; i.e. frame 1 might take 16ms to make, while frame 2 might take 30ms to make. In the end it still might give you 60fps, but those 60 frames will have come at irregular intervals thus giving it a non-smooth/sluggish feel. It's not very noticeable at 40++ fps.

In general though, the hitching you mention is probably not related to microstutter at all. It could be hyperthreading, it could be cpu core parking, and it could be a number of other things.
 
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