Ableton has released a beta version of Live 8.4, which introduces native 64-bit support. The 64-bit version of Live will allow you to use more than four gigabytes of RAM. This means you can work with Live Sets (including Sets using third-party plug-ins and ReWire configurations) that are much larger and more memory intensive than in the 32-bit version. Registered users of Live 8, Suite 8, Live Intro and Live Lite 8 can download the beta now.

More info here: http://www.ableton.com/live-8-beta/signup?utm_source=nl-2012-07&utm_medium=email&utm_term=2012-07-newsletter-en&utm_content=HTML&utm_campaign=64bit+gotye+electrix