60 ratings
DayZ SLI Fix (How to enable SLI)
By Weeddrunken
This Guide shows you how to enable SLI for DayZ... [NVIDIA only]
1920x1080 (FullScreen)
& VSync Off (primary only for checking if SLI works)
GPU Scaling:
Before: GPU1= 98%; GPU2= 9%
After: GPU1= 98%*; GPU2= 98%*

(*=plz read section Known Bug)
SLI compatibility bits:
0x02506405 (Crysis, ArmA 2: Operation Arrowhead, ToH, ArmA 3, ArmA 2, ...)
0. Download [www.nvidia.com] & install the latest NVIDIA Driver
1. Download [www.guru3d.com] & open NVIDIA Inspector
(note: also extract "CustomSettingNames_en-EN.xml")
2. Go to Driver Profile Settings

=> Set Global Driver Profile to DayZ
2.1 Then set SLI compatibility bits to 0x02506405 (Crysis, ArmA2: Operation Arrowhead,...)
2.2 & set all other settings as shown below... => Apply changes
3. Enjoy DayZ with SLI enabled
Attention (Installing a new Nvidia Driver)
Unfortunately after installing a new Nvidia Driver, you have to set your SLI Profile again!
(Even with the Express Installation...)
=> BUT you can "prevent" that by Exporting all customized profiles and Import them back after the new Nvidia Driver is installed!
(Test-) System Specs:
i5 2500K @4500MHz
GTX 460 SLI @840MHz / 2000MHz
16GB DDR3 @1600MHz
Win 8.1 Pro 64bit

Tested on the following NVIDIA Drivers:
  • 331.93 Beta
  • 332.21 WHQL
  • 334.67 Beta
  • 334.89 WHQL
  • 335.32 WHQL
  • 337.50 Beta
  • 337.88 WHQL
  • 340.43 Beta (2nd monitor produced win8.1 bluescreen)
  • 340.52 WHQL
  • 344.11 WHQL
  • 344.65 WHQL
  • 344.75 WHQL
My In-Game Settings
Improve Performance Tips
  • install DayZ on a SSD
  • Unpark[www.coderbag.com] your CPU cores (note: u only have to do this once)
  • Download & run Core Parking Manager[coderbag.com] (I am using 4.5)
    => Before starting DayZ set it to 100%, after back to 5%...
  • write the following line, depending on your specs, in the Launch Options of DayZ(properties)
  • i3 +1GB VRAM:
    -cpuCount=2 -exThreads=3 -maxVram=1024
    i5 +2GB VRAM:
    -cpuCount=4 -exThreads=3 -maxVram=2048
    i7 +3GB VRAM:
    -cpuCount=4 -exThreads=7 -maxVram=3072
    AMD FX8/9xxx +2GB VRAM:
    -cpuCount=4 -exThreads=7 -maxVram=2048

  • set Single Display Perfomance Mode for DayZ in the NvidiaControlPanel
  • set Texture filtering - Quality to Performance for DayZ in the NvidiaControlPanel
  • disable Vsync ingame
  • regular use of Ccleaner, Spybot, actual Chipset&Graphics drivers, WinUpdates,...
  • Win 8.1 RAM Error "not enough memory available" FIX (in case you have 8GB/16GB+)
    (open) type regedit.exe on the Win8.1 start/app screen
    in the registry editor find HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Ndu
    there you right click Start &choose change, then set the Start value to 4
    => this helped Beerdrunken eliminate lags/low fps in almost any game (i7 4770K,R9 290X,16GB DDR3 2400MHz) He noted that his system memory didn't empty by itself e.g. after stop playing a game or 2 or 3 & ran full...
in general: SLI does not double the amount of available VRAM!
Comparison Screenshots
Standard Nvidia Settings @38,8fps
SLI Fix Profile @74,7fps
Standard Nvidia Settings @32fps
SLI Fix Profile @61,5fps
Known BUG
Unfortunately when we're in a village, our frames drop massively.

Nature: GPU1= 98%; GPU2= 98%
Village: GPU1= 52%; GPU2= 52%

Nature => GPU1: 98% GPU2: 98%
Village => GPU1: 78% GPU2: 78% (best measured)
Village => GPU1: 38% GPU2: 38% (worst measured)
Possible Reasons
  • CPU can't handle the load of houses correctly: CPU Bottleneck (=engine has to be optimized)
    and / or
  • Nvidia has to integrate a real DayZ SLI profile
Nature GPU1= 98%; GPU2= 98%
Village GPU1= 50%; GPU2= 50%

PLZ Rate if you like... :)

& follow me for more SLI Fix Guides => click
< >
Weeddrunken  [author] Dec 25 @ 12:25am 
I just giftet myself a Gigabyte GTX 970 G1 Gaming which is as fast as a GTX 980 - wooohoo
=> my 2 GTX 460s are old and gone, although they did a great job since 2010

The bad thing for you is I can't & won't do SLI profiles anmyore...!
The good thing is I can just play & don't have to bother & mess around with SLI (-bits) promisses made by NVIDIA, anymore! It took a lot of time, and wasted precious gaming time.

I wish you a merrychristmas and happy new gamingyear.
Mist3r89 Dec 23 @ 6:57am 
Hi just tested with the new 347.09
Works well so far:)
Weeddrunken  [author] Dec 9 @ 10:04am 
THX @ Euphoria
(...for helping)
Euphoria Dec 9 @ 3:08am 
@c-webb - Yes it does, I have it enabled with 344.75. If you're trying to play Experimental though, you need to add the "Exp.exe" to the DayZ profile in Inspector. But it 100% works with the latest driver, you must have done something wrong dude.
c-webb Dec 8 @ 7:12am 
Doesnt work for me.
Does it work with the Driver 344.75?
Eight armed pet Dec 2 @ 9:29am 
Ahhh, sorry, must of missed that its for running two GPU's.
I know very little about this PC lark. I'll get my coat.
Weeddrunken  [author] Dec 2 @ 9:25am 
If you buy/have a second one, then yes.
Eight armed pet Dec 2 @ 9:04am 
Impressive settings... this games a dog to get running well.
Sorry to be clueless, but would this SLI lark work with/improve a 650m's performance?
TheWriteR Nov 8 @ 8:02am 
Nevermind, It's working again... Thanks anyway =P
Weeddrunken  [author] Nov 8 @ 1:12am 
plz have a look at the comments, others had the same issue...