Ive been through all kinds of solutions for the FPS drop during gameplay. None of them worked until I found the following solution. This is happening to many players as we can see. This issue only involves multiplayer, especially when 4 players encounter a lot of mobs.
Blizz has no solution but I give it a good try:
Head over to this location:
C:\Documents and Settings\username\Documents\Diablo III
Open up D3Prefs.txt in a text editor and modify the following highlighted options to match the image.
This SOLVED THE MAIN PROBLEM for ME! I won't go through all other possible tweaks - as there are too many (which dont work ;-)).
Before changing this I had FPs DROPs DOWN TO 15-20, now I DO NOT DROP BELOW 50FPS! When shit hits the fan with crazyness going on I might drop to 40ish. If nothing crazy is going I play at a constant 80-100 + - FPS during 4 player and casting.
Asus GTX 780 ti
i7 4790 @3.6GHz
D3 on SSD
BenQ XL2420z Screen @120Hz
V-Sync OFF, other settings dont really matter I suppose. I did limit the FPS in fore- and background to 120/50. Rest on max quality. No NVidia tweaks. All on performance - as your PC settings dont really matter - the problem lies within the corrupted D3 settings/programings.
I did fix my stuttering a long time ago by dropping the audio channels to 16 from the ingame menu. Problem is some of the sound won't play anymore or they'll just get chopped off.
The stutters only happen in rakkis area and a few others due to how they handled sound (no idea what they did) but yeah.
Guess it depends if you rather have all the sound playing properly or way less stutters in those particular areas.
True. The problem is moslty baed on the sound channels. I do notice some drop in sound quality when setting it to 16. However I rather have no lags than the best sound. Hopefully this will get fixed with 2.1 by blizzard.
@globeree: glad to hear that this also worked for you!
I tried all of this and it helped me a bit. I am suffering from random stuttering while the ingame fps still shows 60 - and I can clearly see its well below 30. Today I turned off critical numbers and monster hit bars and that seems to have solved it allmost completely.
+1000 to this! I tried the audio thing and it helped about 10 frames or so but was still sitting under 25 in combat. Im thinking its either the trilinear filtering or the hardware class. Whichever it is, i dont drop below 50 now! Yay!
To let people know, DisableTrilinearFiltering "1" obviosly ofcourse disables trilinear filtering. HardwareClass "1" reduces effects over spells etc. This hardwareclass is detected when diablo 3 have being installed. ChannelsToUse "16" reduces sounds channels to use to 16.
For me it really suprise that lowering sound channels to 16 helps alot, because I'm using Creative Alchemy over X-Fi Fatal1ty Champion pci-e card. Alchemy should move all the sounds fully to run over hardware (sound card) so it won't use cpu anymore. Creative Alchemy was made because DirectX stopped using hardware support for sounds, but seems it doesn't work over diablo 3 as it should
No idea what just happened, but my FPS wen't from 30-40 to 60 locked, AAAND!!! temperature of my i5 went down a good 15-20 degrees...Tahnk you!!
Edit: If you have trouble finding the path file, go START > search for ''run'', hit enter > write ''%appdata%'', enter > and you should see your username at the top, click on it > then open ''My Documents'' folder, there you can find Diablo III folder, with your wanted txt file ( I know it can be done easier, but this is how I found it)
Hi@all, Im glad that it worked for the most of you! Please Keep in mind, that this Tweak might not work for everybody.
The Problem that affects the most would be the Sound channels. Reason to this is, that the CPU only uses 1-3 hyperthreading, instead of using all CPUs for the Sound. Lowering the channels will kill some Sound Quality, but enhance over all gameplay.
(u can check this while u alt/tab during gameplay and u will see only see 1-3 high CPU performance, rest ist low)
Trilinear filtering and HardwareClass will lower a bit the graphics, yet enhance over all gameplay
@ZioNNN, if nothing help you increase FPS, try to completely reset you Nvidia Experience Settings to Default, using the tweaks above. And dont worry about ur CPU heating up. While only one hyperthread is being used to calculated the Sound channels, it will heat up like hell, res of the CPUs stay rather cool. It's more of a D3 Problem than your PC.