I have a 550W and just used a couple calculators to see of that was enough and some said yes some said no.
CPU: i7 4790k
GPU: R7 260x
Mobo: AsRock z97 anniversary
Memory: 2×4GB ddr3
120GB SSD
1TB 7200 HDD
Some LED 120mm fans
No overclocking... And please don't make fun of build, I know the GPU...