Have they arrived? DO they work as advertised? What PSU did you use?
They said they would ship them starting July 10. I will use a Corsair RM 1000. Exactly what i use for my two S1. I should be overclocking them to 504 gh/s. (more if possible. depends on temperature and HW %).
I wanted to buy an EVGA SuperNova G2 1300W but there is only 6 PCI-E, you need 8 for two S3 if you want to overclock them. Otherwise, 4 is enough.