Sorrelfur

I have a 64 bit java installed and the memory I have for it to use is 2.5gb. And there are only 68 mods that the modpack is using, is there something I am doing wrong?

I have installed Java 64 bit and I use windows. But when I try to change the memory I can use it only goes up to 1gb. Can someone please help me figure out what I am doing wrong? Nevermind, I actually figured it out!! Is 2.5gb enough memory for the modpacks??