I apologize for inaccurate description, I got slightly frustrated over this thing and didn't think as clearly I could have. Also my fault on Config part, I set it to expire in an hour because linked it to only Tornius in IRC.

I indeed do use X-Fire, and I didn't want to shut it down so tried to disable in-game features instead. I'm happy to inform you it fixed the FPS drops.

By FPS drops I basically mean this: I'm capped at 60 FPS no matter what I try to change, foreground FPS locked or unlocked still capped at 60 FPS.
Normally it stays at 60 FPS through whole login process.
With Inner Space enabled everytime I typed in something or moved cursor my active screen had FPS drops from 60 to even 20, and if I kept moving my cursor it would stay around 30-40 and utterly be too stuttering to play.

I'll take a look at DX11 next, thank you for your reply.