Can't Launch FTB Infinity Evolved

[Durbitz]

I have a issue

When i try to launch FTB Infinity Evolved modpack from official technic launcher it wants 2 gb ram and java 1.8

my issue is i must have java 1.7 for giving ram to technic launcher and i must have java 1.8 for FTB Infinity Evolved modpack

I tried to fix it but when i install java 1.7 and  i give ram the n i download java 1.8 it gets back to 1 gb ram so how i can fix it please help guys i want to play this modpack

Thanks from now... (Sorry For Bad English)

[AetherPirate]

Use these instructions to get 64 bit Java 8, then you can allocate 2GB 

In order to update to Java 64-Bit, please go to the link below and download the version for your computer. If you're using Windows, please use the version Windows Offline (64-Bit). After downloading the updated version of Java. Please click on the installer to install it. http://java.com/en/download/manual.jsp