Taking a look at the Bitmain power supply, the next batch only has 10 PCIe connectors so you can only run 1 L3+ on each one which is disappointing. Does this make it half as efficient? I was really hoping to plug up 2 L3s per power supply unit, like you have setup.
any recommendations on other possible power supplies ?
or just get one APW3++ for each unit?.. wouldn't this waste more energy ?
The power supplies are mainly just supplying the power required by the miner, they are using little for their own operation. So a Power supply for each L3+ would only increase your power usage minimally at the wall. Plus it makes sure you are not going to over tax the power supply so much that you have a higher chance of running into catastrophic failure.