The way it's going it'll be even worse after alpha.

I'm running:
i5 2400 3.1GHz
AMD Radeon HD6900 4GB
8GB RAM

Tweaked my ini file:
sg.ResolutionQuality=100
sg.ViewDistanceQuality=0
sg.AntiAliasingQuality=0
sg.ShadowQuality=0
sg.PostProcessQuality=3
sg.TextureQuality=0
sg.EffectsQuality=0

AMD Catalyst Driver 15.7.1

Catalyst Control Centre is set to use Application Settings across the board.

I'm getting 20-30 FPS on Torias, no spiky behaviour, generally playable. Doesn't look pretty, doesn't look like ass.

WTF I have better GPU than u still i am getting bad fps this aint fair !!! and my settings are also low !!

Same, general better quality PC. Still can't break the 40 fps ceiling. Rain map lucky to get 30 avg,

I've also updated my drivers to 15.7.1, and running AMD Gaming Evolved, though EC isn't optimised within that. I thought I was running with Tesselation Off in Catalyst Control Centre as well, but I just checked and it's using Application Settings.

It's worth noting that it only reaches 30 fps on Torias in the clear, during combat it sits in the low 20s, but still playable. @Sonbot I'm certainly not getting 30 average on Torias, and 40 is quite out of reach. I'll get high 30s on Blackbolt, wasn't able to check the other maps with those settings.

Honestly your numbers are quite similar to mine as I too use the same catalyst drivers. (I don't know the name of the maps so I made my own diluted system). Rain map is 30 when I'm alone, sharply plummeting to 20 in combat. Promethium map, with the sequential point caps, 30 to sometimes 40. Everything else sits at 30 and down. I've been tweaking the settings with basically no results.

I got sick of tweaking and rock bottomed everything except PostProcess Quality to stop it being dark and ResolutionQuality to try and make it look decent. Since that was the best I was going to get for Torias (Rain Map), I stopped. Did you turn tesselation off in Catalyst Control centre, and have forgotten about it? I had tried that a while back, but it didn't change anything to I turned it back on. I'd forgotten the turning back on, so had to actually check.

+

latest drivers are for amd are 16.2.

http://www.guru3d.com/files-details/amd-radeon-software-crimson-16-2-driver-download.html

and i am using this is weird

Torias is FPS killer, drops by double for me - from 50 to 25 and feels like swamp The same with fortress - while its playable with 25 FPS, you always lose to equal opponent with better rig (if you are ranged).