What are you using to cool it?

The RAM setting worked and everything went better for a bit. However, i noticed huge temperatures (92C) when playing a simple game.
I took a glance at CPU-z and HWmonitor's readings. The CPU got 1.52V at some point, with turbo disabled!
This is very high and the temperatures indicate it as well.
I'm now downclocked to 3400 at which 1.25v seems to run and temps are fine (60c under load)

I've read somewhere that XPM profiles can up voltages as well. But i really don't feel safe leaving it at 1.5+v.

Stock settings > Turbo Disabled > XMP 2966 @ 1.35v for RAM > CPU @ 3600 @ 1.52V > 92C
Stock settings > Turbo Disabled > XMP 2966 @ 1.35v for RAM > CPU @ 3400 @ 1.25V > 62C

I have a strong feeling something is really off with whatever regulates voltage.

Cheers

Switch "OC Mode" from "ASRock Setting" to "AMD CBS" then go to Advanced/AMD CBS/Zen Common Options/ and switch Core Performance Boost do disable, that will disable turbo but will leave all adaptive voltages and frequency scalings, you should also get a much lower max core voltage, from 1.4+ with turbo to 1.2+ without it.

No you will not have lower default voltages, 2400G has a default voltage of between 1.395-1.450V, that 1.25V you see its because you disabled turbo. Keep in mind the 2400G can boost all cores to 3.9GHz because it uses Precision Boost 2.0 and mXFR like Ryzen 2nd gen, you need to treat it as such, its not a 1st gen Ryzen its a 2nd gen, it has so much better turbo scaling than the 1st gens, better memory controller, and better IPC, its a 2nd gen afterall

PS 1.25V is not at all to high for 3.6GHz, when it boosts to 3.9-4GHz it will up its voltage up to 1.450V (depending on the silicone, they differ from batch to batch) and that's not high also its perfectly within AMD secifications.

For it to boost to 3.9GHz on all cores and 4GHz on 2-3 of them you need a very good aircooler or watercooling, the 2400G has a declared TDP of 65W but the actual TDP and power draw when stressing both the CPU and GPU can go to about 120-140W, so you need to keep that in mind, the CPU will temperature throttle only at 95C, until then all the throttling you see its because of AGESA 1.0.0.1 power management bugs

Dont compare Raven Ridge voltages with Summit Ridge voltages they are different cores, at any give frequency a 2400G will beat a 1500X (the CPU 2400G replaces) 

PS my 2400G at stock with watercooling scores about 435-440 points in CPU-Z benchmark, much higher than any 1st gen Ryzen CPU, and clock per clock faster than even the 2700X, and between 2260-2310 in multi threading, if I manually OC to 4150MHz on all cores I get about 466-470 in single threaded, and in multithreading @ 4150MHz I get almost 2520 points.

So you cannot compare voltages, because they are different CPU's, Raven Ridge is AMD's fastest CPU regarding single threaded loads. A 2700X @ 4342MHz scores 478points, my 2400G @ 4149MHz scores 470 points.

Just for the sake of it I ran a 4175MHz clock, it even beat the 2700X @ 4350 in single threading

2400G @ 4175

2700X @ 4350

Cheers