no. my laptop has only 4G running Win7x64Pro and it's really not great. I don't even game on here and it's burning through 2G of it without batting an eye. 8-12 should be better.
If you were just running office apps and light web browsing, 4GB would be fine. With any kind of gaming I'd say 6GB minimum, up to the limit of your system/wallet.
4GB is classified as bare minimum for most machines anymore for general usage. I'd highly suggest doubling it to 8. Not only will performance improve, but you hard drive wont thrash as much from using the swap file.