4GB is plenty for gaming. If that and web surfing is all you are doing then don't bother getting 8GB. If you are trying hard to save money or within a certain budget stay with 4GB and use the saved money for a better GPU, CPU, SSD, or whatever component. However, If you are planning to do run a gazillion open apps(some people do this although I can't understand why), photoshopping, digital graphics, animation, or rendering then more RAM is going to help a lot so 8GB, or even more, is ideal. And like some have said, if you got the cash and don't mind spending an extra $20-$25 go ahead and splurge for the 8GB.