The Chrome Team is excited to announce the addition of the Chrome 64-bit Beta Channel for Windows 7 and 8 users. To try it out, download the 64-bit installer from our Beta download pages. The new version replaces the existing version while preserving all your settings and bookmarks, so there’s no need to uninstall a current installation of Chrome.
A full list of changes is available in the SVN log. Interested in switching release channels? Find outhow. If you find a new issue, please let us know by filing a bug.
Source: Chrome Releases: Announcing the Chrome 64-bit Beta Channel for Windows!
Download: Try out Google Chrome Beta