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Additional Vega 56/64 undervolting questions

Feb 22, 2009
701 (0.18/day)
System Name Artas1984
Processor Ryzen 7 2700X
Motherboard Biostar X370GT5
Memory Crucial DDR4 ECC 2X16 GB
Video Card(s) Asrock RX Vega 56 8 GB
Storage Plextor M9PeG 512 GB
Display(s) Dell S2415H
Case Fractal Design Define XL Titanium
Audio Device(s) Asus Xonar Essence ST
Power Supply Evga 750 GQ
Mouse Razer DeathAdder 2013
Keyboard Roccat Ryos MK Glow
Software Windows 10 Pro 1809
Benchmark Scores i've got a shitload of them over 10 years of work
Once again i own Vega 56. Last time there was THIS research. Just recently i have bought a video card in form of Vega 56 from a shop for the first time in ELEVEN years. The last time i bought a video card from a shop was in 2008, when i got HD3850... Ye... Just shows how horrible the aftermarket really is these days, when almost everyone just wants to get rid of their cards from mining rigs with almost no warranty left or people just sell video cards for absurd prices anyway.

So i figured out my core voltages for the best performance. It goes like this:

CLOCKS: DEFAULT until P6 at 1672 MHz and P7 at 1672 MHz
VOLTS: 800/825/850/875/900/1050/1050/ mV
MEMORY: 900 MHz at default voltage
FAN SPEEDS: adjusted manually so that the card would not go above 70 degrees C under stress testing.

I obviously plan to squeeze some more, but before that!!!

First question. Is it common to play with S1-S5 clock speeds or do people only adjust S6 and S7? I have lowered the voltage throughout the whole filed, but kept clocks at default until S6, S7.

Next question. What is this about that S6 and S7 voltages and speeds have to be identical? I recall knowing this a couple of years ago, but can not recall now...

Third question is memory related. I can clearly see that memory speed does not drop during the benchmark like core clocks, temperature related, so you would think that you don't need to undervolt the memory, right? However, increasing memory voltage to achieve greater HBM2 speeds tends to draw more W, right? So does anyone actually undervolt memory to save TDP?
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