The corsair cx430 supplies around 345w and gpu + processor is going to be 245w and mobo around 100w and peripherals will also take some power. Is it a good idea to go for cx430?
Wouldn't go for the CX, why buy a new psu that doesn't have all the connectors you need ?
Even with overclocking 430 watts is enough for the spec
These guys use an overclocked I7-920 / X58 system, your not going to use as much powerhttp://www.hardwarecanucks.com/forum/hardware-canucks-reviews/43366-nvidia-geforce-gtx-560-1gb-review.html
286 watts from the wall running 3D06
82% psu efficiency
~235 watt DC load, did I mention that you wouldn't use as much power ?
Will be a bit higher with some games, not enough to worry about if you choose a good quality psu like the S12II 430