I have an old amd 6350 with a 560ti running on it it only makes about 50,000 point per day on high. My i5 8650k with a 980 makes about 500,000 ppd on medium so it really just depends on what you want to spend.
I had 2 X 8GB not sure if that's your config or not just guessed. If you do 100% utilization you it does look like you do run up in the 600 to 700 range.
http://www.coolermaster.com/power-supply-calculator/
This is a good overclocking estimator for your power supply just to get an idea if 400 is even close.
Anyone having trouble getting folding to run I'm new to it but I had everything running on 3 machines yesterday. Today only the 2 I haven't stopped are working I tried adding a 4th as well same issue it says "Requesting a work server assignment." any suggestions or do I just have to sit idle and wait forever. I let it sit for about 4 hours tonight and it never ran.
Thanks for any suggestions.
This looks like a sweet projector with a wide range of applications it would be interesting to try one out. I'm in the process of redoing my basement it would be great to have something like this for a movie viewing experience.