I'm upgrading from Dual Core to Six Cores How much FPS / processing speed increase?

I'm upgrading from a; AMD Athlon(tm) II X2 270 Processor 3.4GHz
To a; AMD BullDozer Six Core FX-6300 3.50GHz 8MB Cache Socket AM3+

Obviously i have next to no knowledge of what on earth i'm saying, so can somebody please explain in simple terms how this will benefit my FPS on game's such as; Minecraft, Battlefield 3, Dead space.

Minecraft
As of at the moment on max settings i can hit roughly 70 FPS fluxing with decreased particles, V-Sync off, 12 chunk render distance, no fraps open, full screen.

Battlefield 3
In lowest detail's resizeable i still only gain around 15 - 20 FPS

Dead Space
Not really sure but 40 FPS on medium setting's.

Cinema4D
Takes around 30 minute's to render a sophisticated image, shadow's, with Ambient occlusion / depth of field / physical sky / global illumination on.

Computer Start up
Take's around 1 minute roughly to get to login / boot up. Loading Gyazo, nvidia settings, comodo antivirus & razer synapse 2.0

Hopefully this is enough data for somebody to tell me how so will these item's increase in time taken / speed / FPS. All comment's contributed are greatly appreciated! Also if you / know of a video, friend etc who was recently gone through the conversion of dual core to quad core or six core + and know how it impacted there gaming experience etc, that would be great to hear!

Thanks,
Scott

Added (1). I do have 8GB Of ram

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http://www.pcworld.co.uk/...l#longDesc

2nd pc

http://www.pcworld.co.uk/...l#longDesc

scroll up for pc pic and that scroll down for the info of it what one is better 1st or 2nd to play games again i don't know how to build my own and it has to be 500 on the dot well maybe a bit over but. Mostly minecraft i play but the other games i like is cod and assassins creed i don't care if its assassins creed 1 and cod it can be cod mw2 to bo2 what fps will i get and what settings

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