Are there tricks to get Alibre loading big assemblies faster?

Try to make liberal use of configurations and suppress sub-assemblies or parts that are not needed. If you open a design that has suppressed parts/sub-assemblies, the data for those suppressed parts/assemblies apparently is not processed, saving time and memory. Of course, when you're ready for the final "render", you still will have to turn them on.

I searched around and saw that you really can't do much in Windows to improve that, but I found this answer useful:

"trying to make any changes in a sectional view of a large assembly is very slow and frustrating. I usually look at the sectional view, make a few measurements, then exit the section view to make changes. Alibre improves the section view behavior with every new release, but there's still much room for improvement here"

YES and very very time consuming. I working on a model that the ASSM file is over 250Meg. in size and it take almost 3 mins to lad then another 2 to 3 mins before I can do any work on it.
I all but gave up on sectional view. I wanted to do a screen shot of sectional view to show the internals. I let it run over night and it was still updating in the morning. To me and only me Alibre can not handle real world models of any complexed.

There is a simple fix for alibre:
- Change software.
Alibre (GeoMagic) Design is the worst system ever when it comes to handle assemblies, especially + 1000 parts. It simply eats memory. It is probably due to bad programing.

If there is I'm all ears. It seems I send more time opening large assembly then actually doing drawings. It all seems as the assembly grows so do the constrain errors,which might take several tries to get it to load without errors. The error that gets my goat is 'Geomagic Has Stop Working" message. Which I get a lot these days.

I had the same issue so I added more memory to my computer and haven't had an issue.
The program is not the issue, don't be cheap an invest on updating your computer system.

Sorry Pedro,
32gb RAM, 200gb Kingston SSD E100 and Alibre still sucks!

We don't accepts any Alibre commissions anymore - it's impossible to get any economics out of it. It's too expensive for the customer, with little customer values.

Alibre for the time being (2014-November) is the absolute best bang for your money. I own licenses of both Solid Edge and Alibre. For real life manufacturing, Alibre wins hands down. My employees picked up and flew with Alibre in weeks, saving the company good money. Solid Edge is great of you have deep pockets, Siemens bought the company several years ago and has no sympathy for the US companies (original Solid Edge folks are all US people)....