ok. i've been having this stuttering problem for months and i've finaly got it all worked out thanks to some players i ran into on youtube and in d3 forums. turns out the stuttering is from a few problems in the game so it took me multiple changes to both my computer and the game to resolve it. and i got this resolved all without having to buy a usb flash drive or anything like that.
blizzard will prolly flame me for this because everytime i've seen this mentioned in forums, blizz always told the person to undo the changes. but hey it worked for me, so i'ma do what works.
when i bought this game the day before launch, it was smooth and fast running but came patch 1.0.2 the bottom dropped out and i could no longer run the game smoothly. there was stuttering and lagging to kingdom come so i had to turn all video settings to off and low but nothing seemed to change. then came patch 1.0.3, the stuttering got worse. then came patch 1.0.4 the game became unplayable because i could only run at 9 frames so i stopped playing. i began doing some research trying all kinds of things but nothing worked. but then i finally got it working after weeks of frustration. hopefully this helps someone else. i had to do this entire combo of things to get the game back to running fps.
1. edit the d3pref file
- go to Documents\Diablo III folder and open file D3Prefs.txt
- look further down and u'll see a line that says:
- the number inside the quotes can be any number, mine jus happend to be "3"
- change whatever number is there to "1"
- so it should now read
- next look for a line that says
- change the "0" to "1"
- so it should now read
- save the D3Pref file and close it
2. change d3 to run on 2 CPUs.
i have a quad core i5 laptop and apparently D3 has a problem on my computer with running on 4 processors (hard to believe i know you would think it would run better) but i'm guessing D3 doesn't support hyper-threading, at least it seems so on my laptop, and therefore having 4 processors causes the game to run slow instead of faster. i guess because D3 doesn't know how to run on 4 processors. so i had to disable 2 of the processors so i only have it running on 2 processors instead of 4. u have to have diablo running to do this part so startup D3.
- do ctrl+alt+del and click "start task manager"
- click the processes tab and look for Diablo III.exe
- right-click on it and select Set Affinity
- if u have a quad you'll see 4 processors listed, CPU 0, 1, 2 & 3
- uncheck 2 & 3 and click OK
- close task manager
*note about this step: u have to do this everytime u start D3 because it resets it back to all CPUs when u close the game. there are programs out there u can use that can have it permanently open D3 on 2 cpus everytime but u can google that. i'm not going to endorse a program here.
3. disable any programs running in the background that use internet connection.
i had to disable all programs in the background that uses internet connection which included my messenger program trillian, pandora, google music manager and skype. i now only run steam while playing D3 and it doesn't seem to be causing much a problem. i had disabled these in the past anyway but still had the lag and stutter so jus disabling background programs wasn't enough to stop the stutter. not sure if they are listening on the same ports as D3 or not but they seemed to cause a problem too.
now try playing and check the performance.
dont know if this will work for everyone but it worked for me. i now can run the game at all max settings again with a consistant 70-80 frames and all stuttering and lag is gone after many months. i still have occasional rubberbanding tho but that's jus blizzard server lag i can do nothing about. i also do still have the lag problem where i have to cast spells first and somewhat lagging still sometimes when moving forward on undiscovered areas on the map but that's manageable; not really a problem altho it is still something blizzard needs to fix rather than bloating the game down with more eye candy.
i have now been running the game for two days now and there has not been not one stutter problem other than the small issues i jus mentioned above but thats only when i start the game. after that it's smooth gaming and i love it. i've even been able to run co-op games again with my friends in a full group with not much lag. the lag i do get i suspect is jus server lag because all my friends say its happening to all of them at the same time.
Blizzard i love you long time but come on ... it all seems to be a problem on your end because i shouldn't have to go thru all this JUST to play a game and my laptop is new, i jus bought this thing in april and it has a midgrade video chip that can more than handle this type of game; its not like D3 is video intense. i have not had any problems with running WoW, SC2, GW2, Torchlight or any other game on my PC; its limited to only D3. the problems i had with D3 spans from not only a network problem causing lag, but also a video problem causing lag and CPU problem causing even MOAR lag. please fix this.
hope this helps anyone out there
put D3 on a regular 16gb usb flash drive, $10 from wally world (walmart) in conjunction to what i put above and noticed a significant decrease in stuttering from moving forward on undiscovered areas on the map, primarily in fields of slaughter since that stuttered the most. it still twitches a lil bit kinda like its skipping a frame or something but my frames still are between 70-80 fps, but its barely noticeable, prolly cuz i'm lookin for it, i guess this is what u guys were calling micro-stutter? also the drop in frames to 0 from first run animations from spells and narrations are completely gone, however, i did get a few times for no apparent reason a drop in frames to 0 from jus running but i think that was jus rubberbanding maybe as there was nothing on my screen to even cause this; not even an animation. i dont know. but out of playing for about 2 hours, i only saw it happen twice. also the severe lag when inspecting heros from my friend's list is 100% gone as well as the drop to 0 frames on toast windows and leveling splashes. so i guess this is step 4 -_-
again. shouldn't have to do all this jus to run a game.
ty D3 community and fellow players with no help from blizz except more grief.
Edited by Gör#1270 on 9/16/2012 12:39 PM PDT