On Tweakers.net (Dutch site like PCPartpicker/Linustechtips) said: "450w is more than enough for that PC, HDDs and Ssds really don't consume as much power at all that you need to upgrade your power supply if you have a few adheres."
Like I said - a little close to the edge IMO - the strix can pull up to 196w .
The 4790k is a power hog for an Intel chip - you'll be hitting well above 80% load on the PSU in intense gaming conditions.
I would honestly go 100w bigger for headroom - you're buying an over clocking setup there so it makes sense.