Not running any mods.
Using Default Mincraft launcher 1.3.10
Java Version 7 Update 51 (build 1.7.0_51-b13)
Clean install of Forge version 1.6.4-Forge9.11.1.965
Unable to modified the -Xms and -Xmx values, Minecraft is only launching under the following values.
-Xms1G -Xmx1G XX:PermSize=512m...