Bitmain Antminer configuration set up

Hi guys does anyone know what that "Hashrate Unchanged-lower voltage actually means? I tried to look up it says reduced working thus reduced power consumption but hashrate remains the same. Which means the fan and everything is much weaker? Currently i’m on Normal mode so if the hashrate remains the same then there is definitely a negative point to the lower consumption but what is it? Thank you

It is possible to reduce power consumption and not reduce your hashrate. I am not certain on all of the details I just know I was able to do it with my L3 using firmware to edit different things like frequency and overclocking.