That board has a similar 4+1 power delivery as my gigabyte FM1 motherboard and it tops out around 3.4GHz with a llano (gpu disabled). I've tried 4 cpu's in it ...
Get yourself an 8+2 board if you want to overclock higher.
I'm not guaranteeing it won't do 4GHz with that cpu, but those chokes/mosfets are only rated for around 35 amps per phase I believe.
ie: 4*1.4*35 = ~200watts and is temp dependant.
Hmm i think overclocking this Fx-4100 will require an $80-$100 motherboard plus a $30 after market cooler, overclocking is certainly not for budget, at this point i'm thinking of not overclocking at all.