At default clock speeds
the 8350 pulls up to 220w under high load gaming but that can double with an overclock to 450w peak power, and you can get some power spikes even at the default. The
rx 570 is 168w. That combined power draw is 618.
I'm seeing some recommendations for a 620w or 650w
here and
here but it means the psu will be running close to 100% capacity under load when overclocked paired with the rx 570. She'll shake apart, cap'n!
Right now the best thing you could do is turn off 2 or even 4 cores in the bios and treat it as a 6350 or 4350. The additional cores and threads won't make any significant impact on gaming since most games only use one or two threads though they are moving in the direction of multithreaded.
It can still be overclocked with only 4 cores active to bump the single core performance and the power consumption will be more within the limits of your current psu. I overclocked my 4350 to 4.8ghz on my cruddy 500w psu for 3 years without any problems. But an 8350, apart from not making any significant performance difference, killed a cruddy aerocool integrator 850w in less than a month.
The fuse in the plug went when I woke up the pc one day so I removed it from the system, switched it on and it went bang.
Besides which, the overclock doesn't seem to do all that much either. If you can bench press 30kg instead of 25kg it's still weak.