Here is the info on the performance of the new S17+ firmware

S17+ Model 76TH
(Factory Specs: Min = 73TH 3040 watts 40-42 W/T  Normal = 76TH 3340 watts 42-44 W/T   High = 79TH 3668 watts 44-46.5 W/T)

All Tests were done with 250 Volt AC power input Higher AC input voltage should lower the W/T even more and possibly gain extra has at these same settings. Safe temps are 80c or below higher temps may cause premature hardware failure.

640 Freq 1970 Voltage = 84.131TH    3210-3320 Watts    38.2 W/T

650 Freq 1970 Voltage = 84.991TH    3260-3365 Watts    38.3 W/T
650 Freq 1980 Voltage = 84.850TH    3300-3305 Watts    38.9 W/T

660 Freq 1970 Voltage = 85.187TH    3300-3310 Watts    38.8 W/T
660 Freq 1980 Voltage = 85.471TH    3340-3350 Watts    39.1 W/T
660 Freq 1990 Voltage = 85.531TH    3360-3370 Watts    39.4 W/T

670 Freq 1990 Voltage = 83.842TH    3400-3410 Watts    40.6 W/T

680 Freq 1990 Voltage = 81.368TH    3450-3460 Watts    42.4 W/T
680 Freq 2000 Voltage = 85.452TH    3495-3500 Watts    41.0 W/T
680 Freq 2010 Voltage = 84.624TH    3540-3550 Watts    41.7 W/T

690 Freq 2010 Voltage = 87.272TH    3600-3610 Watts    40.5 W/T

Best Max Setting to stay at Factory's lowest W/T Miner will go higher but the W/T starts to increase over 40 W/T
690 Freq 2020 Voltage = 89.795TH    3620-3650 Watts    40.5 W/T