i don't know about the 4350 but the piledriver 6 cores and 8 cores can usually overclock to 5ghz and more, so probably the 4 core can too,
not sure what games you play but most modern titles you will NOT be able to run at 140-110 fps with a 650ti boost, no way in hell, not on max settings only if you use a low resolution... i have 1080p monitor so that's my reference for things
the card is about as powerful as a gtx560 ti... a 660 is still more powerful, and that's not even the current mid range card anymore... the 760 is which is again quite a bit faster...
just do a simpel test to find bottlenecks,
install Msi afterburner or Asus gpu-tweak ... EVGA precision, one of those that have a monitoring graph available,
and run it in the background as well as your cpu load monitor,
if you see one of them hitting the ceiling while other one rests - the one that's on full load is the bottleneck, because it slows down the other,
the thing people don't seem to understand - there is ALWAYS a bottleneck - in every system at any given point in time,
it might just be so tiny that you don't see it - that's what's called a well balanced system,
but the bottleneck still would vary from gpu to cpu depending where you are in the game... while you look at the sky or some wall on closeup your gpu doesn't need much effort to render it so it jumps up to as high as the processor can go or other way around when you have alot of visual "goodies" on your screen but not necessary something that tortures the cpu,- like lots of physics and explosions and many players, enemies etc. etc.
then your cpu will rest while gpu catches up...
still the 6300 or 6350 would have been a better choice... they give bettr fps in most games and are actually very close to the 8 cores while the cost is much closer to the 4 core...
and also - how would one complain about 140-110fps.... obviously you won't see much of a difference because it is already what i would like to call -
Focken' smooth
and just please don't tell me you do not own a 120hz or higher monitor and are trying to see a difference between higher fps than your monitor can physically produce .... please don't