Diablo® III

Giant fps drop after 2-3 mins

My game runs fine at around 24 fps for a couple minutes then eventually it drops, I get massive delay and fps jumps from 4-9 constantly making everything unplayable.

Halp D=

Running in Windowed(Fullscreen) and at other times Fullscreen, both at 1280x1024.
Changing it to a lower resolution slightly improves fps(800x600 jumps from 10-22 fps) but the delay remains undiminished.

Software:

System Software Overview:

System Version: Mac OS X 10.6.8 (10K549)
Kernel Version: Darwin 10.8.0
64-bit Kernel and Extensions: No
Time since boot: 5 days 15:02

Hardware:

Hardware Overview:

Model Name: MacBook Pro
Model Identifier: MacBookPro5,5
Processor Name: Intel Core 2 Duo
Processor Speed: 2.26 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 8 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBP55.00AC.B03
SMC Version (system): 1.47f2
Sudden Motion Sensor:
State: Enabled

Graphics/Displays:

NVIDIA GeForce 9400M:

Chipset Model: NVIDIA GeForce 9400M
Type: GPU
Bus: PCI
VRAM (Total): 256 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0863
Revision ID: 0x00b1
ROM Revision: 3427
Displays:
Color LCD:
Resolution: 1280 x 800
Pixel Depth: 32-Bit Color (ARGB8888)
Mirror: Off
Online: Yes
Built-In: Yes
L1933TR:
Resolution: 1280 x 1024 @ 75 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Adapter Type: Mini DisplayPort To VGA Adapter
Adapter Firmware Version: 1.03

Other:

Input Source ID: com.apple.keylayout.US
Keyboard Layout: ANSI

D3 Prefs
PreferencesVersion "43"
PlayedCutscene0 "1"
PlayedCutscene1 "0"
PlayedCutscene2 "16"
PlayedCutscene3 "0"
DisplayModeFlags "8"
DisplayModeWindowMode "1"
DisplayModeWinLeft "158"
DisplayModeWinTop "128"
DisplayModeWinWidth "960"
DisplayModeWinHeight "768"
DisplayModeUIOptWidth "1280"
DisplayModeUIOptHeight "1024"
DisplayModeWidth "960"
DisplayModeHeight "768"
DisplayModeRefreshRate "75"
DisplayModeBitDepth "32"
Gamma "1.000000"
MipOffset "1"
ShadowQuality "0"
PhysicsQuality "0"
ClutterQuality "0"
Vsync "0"
Letterbox "0"
Antialiasing "0"
LowFX "1"
LimitForegroundFPS "1"
MaxForegroundFPS "30"
LimitBackgroundFPS "1"
MaxBackgroundFPS "8"
DisableTrilinearFiltering "0"
ColorCorrection "1"
MipBias "0.000000"
ReflectionQuality "0"
TonemapExposure "1.900000"
TonemapContrast "1.500000"
TonemapSaturation "1.000000"
TonemapGain "1.000000"
HardwareClass "1"
PCIVendor "4318"
PCIDevice "2147"
MasterVolume "0.400000"
EffectVolume "0.800000"
MusicVolume "0.800000"
NarrationVolume "0.800000"
AmbientVolume "0.800000"
ChannelsToUse "32"
SoundDriver "0"
SpeakerMode "0"
ReverseSpeakers "0"
QuestSubtitlesEnabled "0"
CinematicsSubtitlesEnabled "0"
EchoQuestDialogToChat "1"
MuteSound "1"
MuteEffects "0"
MuteAmbient "0"
MuteVoice "0"
MuteMusic "0"
Edited by Aracknid#1574 on 10/18/2012 11:02 AM PDT
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90 Human Priest
6220
Posts: 14,013
Just a quick question, since you're running Snow Leopard - are you using a USB microphone or headset by chance? Snow Leopard has a bug that was fixed in Lion (10.7.2 and later) regarding the GeForce 9400M and USB audio I/O devices.

If you have such a device plugged in, try unplugging it while you play. As long as you are in Snow Leopard, you will need to not use any USB based audio devices on a computer using the 9400M chipset.

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Ty for the response! =)

Unfortunately my keyboard and mouse take up my only 2 USB slots, my headphones aren't USB.
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90 Human Priest
6220
Posts: 14,013
Ty for the response! =)

Unfortunately my keyboard and mouse take up my only 2 USB slots, my headphones aren't USB.


Well, that at least eliminates one variable. :)

I noticed your HardwareClass is set to "1". Can you try making a backup of the D3Prefs.txt file and changing it to "3" and see if it helps any? I know your card is on the low end of the scale for D3's support, but it may be enough to stop the framerate spikes.

If this doesn't work, then no harm, no foul since you can just replace the D3Prefs.txt file with your backup copy and continue troubleshooting from there.

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Edited by TheTias#1192 on 10/18/2012 4:44 PM PDT
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This sounds like the documented problem of frame-rate cycling on Macs.
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