What case do you have? It could be as simple as an ventilation problem. You need to have more CFM going out than coming in. This creates a negative air pressure environment. It aids in pulling air in to the case taking the load off the intake fans.
I just rebuilt my system using an Antec P280 case. Although it can support intake and internal fans, they turned out to impede the flow of air in to the case. After removing them and doing a through clean up including the heat sink, it runs cooler and quieter.
The CX430 is not enough to push all the devices you have and do a CPU over clock that is stable. I'd be upgrading that PSU to at least and AX850 or AX860. They are completely modular. I like mine. I just keep adding devices and it doesn't even work up a sweat.