Severe stuttering on minecraft.

rollingbarrels

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Oct 6, 2015
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Ok so here's the scoop. My performance on minecraft had already been stuttering a little bit in the past, but it was nothing I couldn't ignore and keep playing. However, recently when I log on to play minecraft I have noticed very severe stuttering to the point where it is almost impossible to just ignore it and keep playing. The only things that I have changed since not having as much stuttering is that I have overclocked my CPU by an additional 0.1 GHz and added more mods to the game.

These aren't dips in fps because the game will say that I am playing at about 80 fps most of the time, and the fps counter on fraps agrees. This is where the game's behaviour starts to get a little weird. Turning down all the video settings to the very minimum gets me very smooth gameplay at around 350 fps, so my first thought was that I am losing a percentage of my frames to a poorly synchronised monitor.

However, this only happens when I touch the smooth lighting, mipmap or anisotropic filtering settings. When I have all three off, I can turn up all the other settings including graphics and render distance and still get perfectly smooth gameplay. I can even turn on shaders which brings me all the way down to around 30 fps and still get no stuttering whatsoever. No frames lost. Turning mipmap and filtering up gets me a little bit of stuttering when I dip to 60 fps, nothing too noticeable. As soon as I touch smooth lighting though.. Boom. Severe stuttering.

My memory usage during stutter is 30% overall and 11% of the allocated RAM in-game, CPU 14%, which is the same as when I'm not stuttering. GPU loads seem normal too. I suspect that this is something to do with my CPU, since smooth lighting, mipmap and anisotropic filtering all sound like CPU intensive settings. I have an AMD FX-8370E overclocked to 4.3 GHz. I knew AMD CPUs were bad, but I never could have imagined they'd be this bad. Tsk tsk, shame on you AMD, I only bought your products because I felt sorry for you being outmatched by all your competitors :pfff:.

So now, the question is, is there any way to remedy this stuttering? This build is fairly new, so I would very much prefer not to buy any new parts just yet. I experience no stuttering in more modern games that require higher specs, so surely there must be a way to make minecraft perform more optimally.


My PC specs, if they matter:

FX-8370E @ 4.3 GHz
MSI 990FXA Gaming
MSI R9 390 Gaming Edition
Samsung 850 Pro SSD
1200W Seasonic Platinum

Thank you very much for reading. Any help is appreciated.




 
Solution
It has been a while since i played minecraft last Maybe 8 months much has changes since then

Just keep playing with all the settings one by one hover the mouse over them it will tell you what it does :)

a few things i remember
- use fast math
- use multicore rendering

if it dosen't work the simple explanation is that you are using too many mods.
My reading indicates that minecraft is cpu limited and single threaded.
14% utilization on all 8 threads is a pretty good indication of this.
I do not know why an added overclock should make you do worse.
Possibly you have exceeded the cpu thermal limits.
Try backing off that last .1.

To test the single threaded theory, remove 4 threads and see if it makes much of a difference. You can do this in the windows msconfig boot advanced options option. set the number of processors to less than you have.

To test the importance of individual core speed, back off your oc from 4.3 to say 3.5 and see how that changes things.



 

rollingbarrels

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The readings I get on Core Temp suggest that minecraft is making use of 4 cores, which is the same as most other games. My temperatures don't exceed 40°C at any point while running minecraft, so I don't think I'm getting any thermal throttling. I also think it's worth mentioning that I normally get a rounding error on one of my cores in Prime95 after a few hours of torture testing, but I can't imagine that would have such a significant impact on gaming. As far as I know, the rounding errors can cause crashes when they happen, but not video stuttering. I could be wrong though. I will probably do some of the things you have mentioned either way, as I am interested to investigate the actual benefits of overclocking anyway.
 

rollingbarrels

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I finally managed to get Optifine working, only to be greeted with more options than I could hope to understand right away. Are there any Optifine settings you can recommend that might help me?

 

Xtergo

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May 4, 2015
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It has been a while since i played minecraft last Maybe 8 months much has changes since then

Just keep playing with all the settings one by one hover the mouse over them it will tell you what it does :)

a few things i remember
- use fast math
- use multicore rendering

if it dosen't work the simple explanation is that you are using too many mods.
 
Solution

rollingbarrels

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As I feared, the problem still persists with various Optifine settings. The fact of the matter is, that as long as smooth lighting is there, the stuttering will happen. Without smooth lighting the gameplay is very smooth, but as soon as I add even a little bit of smooth lighting I get very horrible stuttering. I tried running minecraft without mods and smooth lighting works like a charm, so I guess you're right; the problem is in one or more of my mods. This is strange to me though, since I know people who are running the same mods on comparatively worse systems and they don't have any issues with smooth lighting. I guess my install is just cursed :lol: