Antminer L7 from Bitmain is mining Scrypt algorithm using a utmost hashrate of 9500MH/s for a power usage of 3425W. We linked an EVGA Supernova 1300 watt plus a 1200 Watt customized Spondoolies PSU on the S9. If employing two PSUs It's a should which they be linked in the proper way. One