1.100V max. is AMD recommendation, unless SoC LN2 Mode is enabled (and the CPU is used in sub-zero temps).
0.950V is the default level and based on my experience, going over 1.000V is excessive as 0.950V should be more than enough for 1800MHz.
It is silly to brute-force anything by using the voltage, if there is no natural scaling. Especially when the difference between e.g. 1800MHz and 1900MHz is diminishing, and if there is > 150mV delta in the required
voltage between the two.
Also, to get 1.100V VDDG you need to ramp up the VDDCR_SoC (the source) to ~ 1.150V levels as well. Even at 1.100V SoC and 0.950V VDDG, were are already talking about ~28W typical "uncore" (SoC + ROC)
power draw for 2 CCD SKUs.