Want to squeeze out a bit more juice from your Google Chrome browser and have a 64-bit Windows 7 or 8 machine? Google has just released a 64-bit version of the browser. It promises to boost speeds by up to 25 percent and better security for 64-bit Windows 8 devices. According to the Chromium blog, the Canary and Dev channels of Chrome already have it. The Chromium team even goes so far to suggest that the 64-bit Dev version is more stable than 32-bit Chrome. We would recommend you get it through Dev channel though as Canary is a relatively new build without much internal testing done.
Source: Chromium Blog + Engadget