Hello.
I think me and most people there with slower CPUs have performance issues.

My Computer:
MSI GTX 650,OC,1Gb
AMD Athlon II x4 620 - 4 x 2.6 Ghz
4 GB Ram Memory

I know, it isn´t the best,but i can run most games on medium-high details with ~35 FPS. For example: Crysis, Crysis 2, Borderlands 2, Red Orchestra 2, Far Cry 3,etc..

And in A3, i have 60 FPS in SP, on airbase with 20 AIs and 10 vehicles.
When I join a MP server with similiar number of units,i have 15-25 FPS.

Can someone explain, why i have that low FPS in MP? Bad optimization on quad-core CPUs? Or bad optimization on AMD CPUs?