OK, so without OC I have a framerate of 37-58 !!!!
With almost everything on the highest setting. With TGP AND Mavericks powered. ( Only Range on medium and mirrors off; cockpitshadows on; Vsync off; treeshadows off; shadows are currently medium, but It seems I can put them on high with only 2 frames loss)
In the shark I have the same rate, but with a few negative spikes ( like 12 frames for four seconds. I don´t really know why they are here. )
So, I for one, do highly recommend the 6300. Those framerates are awesome