Does a CX430 have enough power for this build?

No, you need a minimum of 500 watts but I would get a 600 watt psu for that and for future upgrades. That cpu is already over 11 years old.
 
I have a similar outfit on one of my machines, except it has a 4790. That PSU runs mine perfectly as the GTX 970 is very efficient, plus your CPU is a lower power model as ~I'm sure you are aware.
 
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