I am using a FX 6300 on a Sabertooth R 2.0.
With a Corsair H60 cooler ,with 2 Gentle Typhoon ,in push pull to out ,i could reach a 4,7Ghz on one module of the 3.
4,9Ghz was the maximum to allow me boot.Voltages were kept somewhere in the 1,44V area.
With a better cooler more voltage can be pumped.
With relative normal temperatures ~ 65 -70 Celsius ,i could also get 4,5Ghz on 2 modules and a 4,4Ghz on all 3.
This are frequencies that run steady in any online game BF 3 ,BF BC2 ,CS GO ( a stressfull one for the CPU) ,Far Cry 3 ,AC 3 and so on.
Using only one module at 4,7Ghz was ok for CS GO for example.
It is a good performer.
At default clocks it would be slower ,in spite of hitting the 4,1Ghz turbo ,than having all cores set at 3,9Ghz ,so all reviews found around should be taken into consideration with an amount of doubt ,of what this CPU does exactly for the money payed.
Having in mind the Mantle API i am SUPER sure that in any game that will use Mantle ,this CPU would be good enough even at 3 Ghz ,on all cores.
I can play on a single card ,a old ATI unlocked Sapphire 6950 ,any game and i am only limited at 1080p (my display) by the video card ,that is kinda old.
I would say pairing those cards with a FX 6300 ,even mildly overclocked, should be ok for gaming.
Best CPU for the money around.
By the way, Prime 95 (the latest one) is not able to load it at default settings (CNQ/Core Boost) ,it always bounces at around 3000Mhz-3500Mhz.Never reaches top clocks and never loads all cores fully.