Just make sure there is nothing flammable near by if you are going to do that long term. I have seen this go very bad.
I am running 3 S1 on a 1200 watt PS Silverstone Tek ATX12V/EPS12V 1200Watts 80+ Gold
power to the wall is 1100 watts.
All of my S1 are over clocked to 400 giving me on average 200GH. I did add a second fan to every S1.
Ya, I did ensure they were not near flammable items and added cooling. No one likes an electric fire. I did end up re-adjusting their clock speed to pull less power.
I dont exactly think 'stupid cheap' fits well in this situation as both brands are generally reliable even with their 'value' PSUs and still not the cheapest option. Additionally in the long term a higher rated Platinum PSU running closer to 50% load would be more cost efficient. This was more a novice, 'I wonder if this will work' moment(regardless to the consequences of blowing any PSU's)