FIxed FPS in Arma 3! Read if you have fps problems. worked for me

[miK]

1. Open Up Steam
2. Go To Your Game Library
3. Right Click ArmA 3
4. Click "Properties"
5. Click "Set Launch Options"
6. Add the commandlines that is the correct for you in the lauch options
7. press "ok"

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For AMD CPU users:

AMD Dual Core with 4GB System Ram:
"-noSplash -cpuCount=2 -high"

AMD Quad Core with 4GB Ram:
"-noSplash -cpuCount=4 -high"

AMD Six Core with 4GB Ram:
"-noSplash -cpuCount=6 -high"

AMD Eight Core with 4GB Ram:
"-noSplash -cpuCount=8 -high"

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Intel CPU:

For Hyperthreaded CPU's such as a Quad Core you will apply this:
-cpuCount=8

This will enable your Hyperthreads on your CPU so your CPU will act as an eight core when running Arma 3.

If you are running a Hyperthreaded Six Core then:
-cpuCount=12

If you are running a Hyperthreaded Eight Core or Eight Core Xeon then apply this:
-cpuCount=16

If you are running just a non Hyperthreaded CPU such as a Quad Core then select "4" instead of "8" same for a Dual Core you will select "2" instead of "4"
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If your running more than 8GB Ram then apply this to the end of the launch line:
"-maxMem=8192"
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Even if its not on the "Intel CPU" get the "-noSplash" in there aswell

I got from 29 fps on every quality settings to around 70-80 fps.
Turn OFF Vsync! it kills the FPS

This is my command line:
-cpuCount=8 -maxMem=8192 -maxVram=3071 -noBenchmark -noLogs -noPause -noSplash -world=empty
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Windows 8 users have experienced problem with this, that its not fixed their FPS ingame.

[Dwarden]

-high is nonexistant commandline parameter (aka urban myth nonsense)
-maxmem has maximum 2047 (anything higher is limited to 2047 for now)

stop using 'randomly random guides and read biki what're existing commandline params)

[Johnny]

I'm heading over to the wiki to check out the commands, but if the maxmem is hardcoded I can understand it wouldn't work to surpass it, if high isn't a command then yeah that's stupid. What about the rest though?

[TeeJay]

Placebo

[H3@d5hO7]

I have removed all the parameters from launch option. So far, automatic detection works better.

[niick1402]

If your running more than 8GB Ram then apply this to the end of the launch line:
"-maxMem=8192"

how much if you have 8 gb ?
and an i5 4670k doesn't hypertread right ? only the i7?