I already have dual x r9 270x graphic and i need new mobo/cpu/ram for around 400€. I have this on my mind is this good for gaming http://pcpartpicker.com/list/sH9PwP ? or you have any better suggestions ?
That'll allow a (mild) overclock, as the 212 Evo is little more than a stock cooler replace (as unlocked Skylake chips don't come with stock coolers). It's also only 2133MHz RAM which is a bit of a waste considering the Z170 chipset will allow higher speeds.
Your initial build is fine though, no problems there. If anything, you could scale it back a little and get an 'ok' SSD too...