If you turn your graphics down to the lowest setting, you can box Rift with just as many boxes as you did WoW.

I 5-boxed WoW on a laptop, and now I do the same with Rift. I read somewhere that people were saying its a lot more graphics intense, and that if you could 5-Box WoW, you could dual box Rift. This is nonsense, do not listen to it. I 5-box Rift just fine on a laptop.