ram previo

[Joey Foreman]

Get more RAM.

Or increase the RAM allotment to AE in Preferences.

Careful, though…

https://blogs.adobe.com/toddkopriva/2009/12/performance-tip-dont-starve-yo.html

[Todd Kopriva]

And, to cut to the real point:

Relaize that you often will not be able to preview the entire duration of your movie with RAM preview. If you really need to see the whole thing in real time, with sound, and at full resolution, you sometimes just have to render out a movie and watch that.

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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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[Joey Foreman]

Yep, Todd’s right. You can learn to work well within your limitations, rather than just throwing money at the problem.

I started working with AE in 2000 on my trusty ole G4, 1.5 Gb RAM, on projects with tons of layers and effects. You figure out pretty quickly how to generate longer previews by switching off what’s inessential, lowering resolution and/or quality, prerendering, using proxies, region of interest, etc., etc.

I work on much more powerful hardware these days, but none of that’s changed.

It just has to do with the limitations of today’s hardware. Eight core, 64 bit, whatever, you’ll still have to employ the same workarounds. $500.00 worth of new RAM might get you another 15 or 20 seconds, unless you add another effect or layer, then you’re right back where you were.

[Josue Ruiz]

Thanks for your answer helped me a lot.