I am using 1000W power supply. Is that enough to run 4x 5830s?
I am using a 1000watt psu for 4x 5830s fine but i have a another for the cooling system 8 fans.
It should be fine to say 300watts for the mobo and 200watts for each card but that is over kill with overvolting and overclocking
300watts(mobo) +200watts x4(5830s)=1100watts
to be 100 percent safe i would lean towards the 1200watt psu to power everything.