Hello:
I was playing Asssassin's creed 3
it runs on 10 to 30 fps ... average 20 fps
on lowest settings possible
MY Specs;
GPU: Amd redeon HD 7770 with 2Gb Vram DDR5
RAM: 6GB
CPU: Amd phenom x3 8600b 3 core 3 threads with 2.30 GHZ
and as far as I know AC 3 should run nicely on my system...