Just to share my numbers:

XFX RX 5700 XT THICC III

out of the box: 49.x MHs

settings to reduce power consumption and a bit of OC (no bios mod)

Core Clock, Mhz = 1400
Core Voltage, mV = 790
Memory Controller Voltage, mV = 790
Memory Clock, Mhz = 1800
Memory Voltage, mV = 1350
Fan, % = 65%

Results:
51.17 MHs
Core 44 Celsius degrees
Mem 62 Celsius degrees
Power consumption 112 watts