The reason they recommend against the 1.55 volts is because it exceeds the 0.5v limit between the VTT voltage and the DRAM voltage.
Too large of a potential difference between RAM voltage and vtt/IMC voltage will cause too much back current against the diodes and transistors, causing breakdown and leakage, leading to a lower life expectancy of the CPU
I knew this going in. That's the whole reason I posted this in the first place.
I want to raise my vtt voltage so I can raise my RAM voltage, so that I can take advantage of the temperature headroom.
Let me repeat....
1.0v + 0.5v = 1.5v
1.55v > 1.5v : Not good
I want around 1.7v.
1.7v - 0.5v = 1.2v
So I'll need around 1.2v vtt/imc
In order to raise my vtt, I need to change the option in the BIOS.
Most people with motherboards in this series have the option.
I'm on here asking why. If there a hotkey I'm missing, or if there was a BIOS update that removed it.