[Frank Kruse]

If you see PT getting close to 3.7GB it can help to manually delete the undo-cue. But it's obvious that before PT is 64bit we won't be able to use HDX3 to it's full capabilities.
Especially in film mixes where the amount of regions in one reel at 700+ tracks even without plugins is close to impossible to work with currently.

You can improve things slightly by splitting into half reels or working with minimum undos but ultimately this will only improve with 64bit.

Currently it's a ferrari engine fitted into a VW beetle (or vice versa) the weakest part determines the overall performance.

hopefully very soon this will change. it just has to...