massive fleet = impossible = freeze window ALWAYS

I confirm, I have the same problem.

I unconfirm. I don't have thatn problem.

Lower your graphics settings, turn off special effects, disable skyboxes, make sure your computer can run the game.

Make sure you don't have any other programs running in the background except for steam.

stop trying to use your toaster oven as a gaming system

You mean using a gaming computer for cook food :

Well, having a 7 year old computer, i have no problem with Rebellion and slowndown... all setting on hightest, filter and shadow included, custom ultra huge random map ( 10 star, 4 pirates bases by star, 10 player, over 350 planet )... 10 hours play, everybody maxed fleet and planet, insane novalith bombardment, etc ... and the game is only using 1.1gb ram and not slowdown... only a little frooze ( 1 second or so ) when i zoom in and out very fast, multiple time...

Your computer must be a beast then. If I would try a map like that on mine, it would fry to death. Even though it is a top of the line Macbook with a heavy quadcore processor and a great video card...

The only problem I have is immense lag when a large fleet jump to another star at the same time. (when the phase jump loads)

Yea the Phase Jump Charge Up effect still (after all those releases) weighs heavily on most pc's.

Is not your 7-old computer dual-CPU system?   

@ Teun-A-Roonius> with all the respect, great notebook video-card is an oxymoron.

Well I got a 1GB vidcard which should do fine in my opinion.

number of gigabytes is fairly irrelevant. the number of shader computing units is what makes the GPU strong, and notebook gpus are generally pretty lackluster in this regard (because lot of shaders = lot of Watts needed). There are however few high-end mobile GPUs, which are spec-wise closer to their desktop brethren, maybe you have one in your macbook.

nice reply timmaigh, +1