SFX PSU Query

[Antony101]

I've recently purchased an ITX motherboard to downsize my PC due to a change in usage.

What SFX PSU would be suitable to power a 2600k and a GTX 970? Nvidia recommends 500W for the GTX 970 but I've no idea how accurate that is.

 

[Antony101]

It would be the 2600k at stock speeds, an EVGA GTX 970 SC, 16GB of memory and an SSD.

Nothing overly fancy, I would like it to be a bit future proof though as the CPU and GPU are getting a bit old.