I used a i5 3570+GTX670+H61d2b3+4GigRam+HDD+DVD in a 400w power supply(HCG-400). since i use no more components my power draw was ok, i could even put an HD7970 Here. Since CX430 have close to the same +12V rail power, i recommend you to buy another power supply to power this config. With a 500W power supply you will able to power up to a GTX Titan.