How many watts above estimated power usage PSU should I get?

[dyl47]

I am getting a 600w corsair PSU, according to a calculator I should get a minimum 540w PSU. Will this be enough?

The build is i7 4790k w/ 760ti, 32gb ram, 3HDD's

 

[dyl47]

I'm rolling with it. If it doesn't allow me to overclock to 5.0ghz and slap in a Titan Z, that's okay. I will just use it in a build I make for someone else.

 

[Moonstick2]

It'll provide sufficient to your current rig. If you overclock or put an extra/more powerful graphics card in then it'll get edgy.