I have 12 GB Of RAM on my computer but if in the Java Arguments if I put More Than Two it crashes

[23:10:32 INFO]: Minecraft Launcher 1.3.11 (through bootstrap 5) started on linux...
[23:10:32 INFO]: Refreshing local version list...
[23:10:32 INFO]: Current time is Apr 15, 2014 11:10:32 PM
[23:10:32 INFO]: System.getProperty('os.name') == 'Linux'
[23:10:32 INFO]: System.getProperty('os.version') == '3.2.0-60-generic-pae'
[23:10:32 INFO]: System.getProperty('os.arch') == 'i386'
[23:10:32 INFO]: System.getProperty('java.version') == '1.7.0_51'
[23:10:32 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[23:10:32 INFO]: System.getProperty('sun.arch.data.model') == '32'
[23:10:32 INFO]: Refreshing remote version list...
[23:10:33 INFO]: Refresh complete.
[23:10:33 INFO]: Loaded 1 profile(s); selected 'biglemon29'
[23:10:33 INFO]: Refreshing auth...
[23:10:33 INFO]: Logging in with access token
[23:10:53 INFO]: Getting syncinfo for selected version
[23:10:53 INFO]: Queueing library & version downloads
[23:10:54 INFO]: Download job 'Version & Libraries' started (16 threads, 26 files)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl-platform/2.9.1/lwjgl-platform-2.9.1-natives-linux.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/mojang/authlib/1.5.13/authlib-1.5.13.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl_util/2.9.1/lwjgl_util-2.9.1.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/io/netty/netty-all/4.0.10.Final/netty-all-4.0.10.Final.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/net/java/jinput/jinput-platform/2.0.5/jinput-platform-2.0.5-natives-linux.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/paulscode/codecjorbis/20101023/codecjorbis-20101023.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/org/apache/logging/log4j/log4j-core/2.0-beta9/log4j-core-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/net/sf/jopt-simple/jopt-simple/4.5/jopt-simple-4.5.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/paulscode/librarylwjglopenal/20100824/librarylwjglopenal-20100824.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/java3d/vecmath/1.3.1/vecmath-1.3.1.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/paulscode/codecwav/20101023/codecwav-20101023.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/org/apache/logging/log4j/log4j-api/2.0-beta9/log4j-api-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/google/code/gson/gson/2.2.4/gson-2.2.4.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/org/apache/commons/commons-lang3/3.1/commons-lang3-3.1.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/commons-codec/commons-codec/1.9/commons-codec-1.9.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Download job 'Resources' skipped as there are no files to download
[23:10:54 INFO]: Job 'Resources' finished successfully (took 0:00:00.000)
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/commons-codec/commons-codec/1.9/commons-codec-1.9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/org/apache/commons/commons-lang3/3.1/commons-lang3-3.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/java3d/vecmath/1.3.1/vecmath-1.3.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/net/sf/trove4j/trove4j/3.0.3/trove4j-3.0.3.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/tv/twitch/twitch/5.16/twitch-5.16.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl/2.9.1/lwjgl-2.9.1.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/io/netty/netty-all/4.0.10.Final/netty-all-4.0.10.Final.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/org/apache/logging/log4j/log4j-api/2.0-beta9/log4j-api-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/tv/twitch/twitch/5.16/twitch-5.16.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/commons-io/commons-io/2.4/commons-io-2.4.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/paulscode/libraryjavasound/20101123/libraryjavasound-20101123.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/paulscode/libraryjavasound/20101123/libraryjavasound-20101123.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/google/guava/guava/15.0/guava-15.0.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/commons-io/commons-io/2.4/commons-io-2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/libraries/com/paulscode/soundsystem/20120107/soundsystem-20120107.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/google/code/gson/gson/2.2.4/gson-2.2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Attempting to download /home/nick/.minecraft/versions/1.7.9/1.7.9.jar for job 'Version & Libraries'... (try 0)
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/org/apache/logging/log4j/log4j-core/2.0-beta9/log4j-core-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/paulscode/codecwav/20101023/codecwav-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/net/sf/jopt-simple/jopt-simple/4.5/jopt-simple-4.5.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/paulscode/librarylwjglopenal/20100824/librarylwjglopenal-20100824.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl-platform/2.9.1/lwjgl-platform-2.9.1-natives-linux.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/paulscode/soundsystem/20120107/soundsystem-20120107.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/paulscode/codecjorbis/20101023/codecjorbis-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/net/java/jinput/jinput-platform/2.0.5/jinput-platform-2.0.5-natives-linux.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl_util/2.9.1/lwjgl_util-2.9.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/mojang/authlib/1.5.13/authlib-1.5.13.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl/2.9.1/lwjgl-2.9.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/com/google/guava/guava/15.0/guava-15.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:54 INFO]: Finished downloading /home/nick/.minecraft/libraries/net/sf/trove4j/trove4j/3.0.3/trove4j-3.0.3.jar for job 'Version & Libraries': Local file matches local checksum, using that
[23:10:55 INFO]: Finished downloading /home/nick/.minecraft/versions/1.7.9/1.7.9.jar for job 'Version & Libraries': Used own copy as it matched etag
[23:10:55 INFO]: Job 'Version & Libraries' finished successfully (took 0:00:00.770)
[23:10:55 INFO]: Launching game
[23:10:55 INFO]: Looking for old natives & assets to clean up...
[23:10:55 INFO]: Unpacking natives to /home/nick/.minecraft/versions/1.7.9/1.7.9-natives-409672875180
[23:10:55 INFO]: Launching in /home/nick/.minecraft
[23:10:55 INFO]: Half command: /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java -Xmx8G -Djava.library.path=/home/nick/.minecraft/versions/1.7.9/1.7.9-natives-409672875180 -cp /home/nick/.minecraft/libraries/java3d/vecmath/1.3.1/vecmath-1.3.1.jar:/home/nick/.minecraft/libraries/net/sf/trove4j/trove4j/3.0.3/trove4j-3.0.3.jar:/home/nick/.minecraft/libraries/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar:/home/nick/.minecraft/libraries/net/sf/jopt-simple/jopt-simple/4.5/jopt-simple-4.5.jar:/home/nick/.minecraft/libraries/com/paulscode/codecjorbis/20101023/codecjorbis-20101023.jar:/home/nick/.minecraft/libraries/com/paulscode/codecwav/20101023/codecwav-20101023.jar:/home/nick/.minecraft/libraries/com/paulscode/libraryjavasound/20101123/libraryjavasound-20101123.jar:/home/nick/.minecraft/libraries/com/paulscode/librarylwjglopenal/20100824/librarylwjglopenal-20100824.jar:/home/nick/.minecraft/libraries/com/paulscode/soundsystem/20120107/soundsystem-20120107.jar:/home/nick/.minecraft/libraries/io/netty/netty-all/4.0.10.Final/netty-all-4.0.10.Final.jar:/home/nick/.minecraft/libraries/com/google/guava/guava/15.0/guava-15.0.jar:/home/nick/.minecraft/libraries/org/apache/commons/commons-lang3/3.1/commons-lang3-3.1.jar:/home/nick/.minecraft/libraries/commons-io/commons-io/2.4/commons-io-2.4.jar:/home/nick/.minecraft/libraries/commons-codec/commons-codec/1.9/commons-codec-1.9.jar:/home/nick/.minecraft/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar:/home/nick/.minecraft/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar:/home/nick/.minecraft/libraries/com/google/code/gson/gson/2.2.4/gson-2.2.4.jar:/home/nick/.minecraft/libraries/com/mojang/authlib/1.5.13/authlib-1.5.13.jar:/home/nick/.minecraft/libraries/org/apache/logging/log4j/log4j-api/2.0-beta9/log4j-api-2.0-beta9.jar:/home/nick/.minecraft/libraries/org/apache/logging/log4j/log4j-core/2.0-beta9/log4j-core-2.0-beta9.jar:/home/nick/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl/2.9.1/lwjgl-2.9.1.jar:/home/nick/.minecraft/libraries/org/lwjgl/lwjgl/lwjgl_util/2.9.1/lwjgl_util-2.9.1.jar:/home/nick/.minecraft/libraries/tv/twitch/twitch/5.16/twitch-5.16.jar:/home/nick/.minecraft/versions/1.7.9/1.7.9.jar net.minecraft.client.main.Main
[23:10:55 INFO]: Client> Invalid maximum heap size: -Xmx8G
[23:10:55 INFO]: Client> The specified size exceeds the maximum representable size.
[23:10:55 INFO]: Client> Error: Could not create the Java Virtual Machine.
[23:10:55 INFO]: Client> Error: A fatal exception has occurred. Program will exit.
[23:10:55 ERROR]: Game ended with bad state (exit code 1)
[23:10:55 INFO]: Deleting /home/nick/.minecraft/versions/1.7.9/1.7.9-natives-409672875180
[23:10:55 INFO]: Ignoring visibility rule and showing launcher due to a game crash