My vegafe voltage scaling

[Soulkeeper]

Hey, figured i'd post my results.

min voltage tested for stability to the lowest 0.005 at 1000, 1200, and 1300 to 1600 in 25MHz increments
852MHz is the stock lowest with 0.800v I didn't mess with that.
Stability testing included 1x run of unigine super and 3x runs of unigine tropics at 4K with max settings.
I crashed/locked up the system over 30x to create this over the weekend.
25MHz testing of 1000-1300 could be done for granularity, but you get the idea.
The voltage increments needed for each 25MHz above 1300 increased, and gets a little steeper above 1425

This is with the stock vegafe aircooler, stock bios at 220w, and thermal grizzly conductonaut applied. Custom aggressive fan control program (max at 60c).
This is all in linux now that voltage control works

 

[DrMrLordX]

Damn, your VegaFE works with volts that low? Mine has a fit at anything below 1.1v . The only good thing I can say about it, is that if I give it +50% power budget that it can do solid 1585 MHz non-stop with an aggressive fan profile and 1.1v . It sucks power like a hog doing that, though.

Do you have any power usage data for your higher-clockspeed runs?

Also, what are you doing to control clockspeed? Are the default boost maps doing the work for you, or are you hand-setting clockspeed somehow? All my experiences with VegaFE are in Win10 using WattMan since none of the 3rd-party tools seem to support my card.

 

[Paratus]

Hey, figured i'd post my results.

min voltage tested for stability to the lowest 0.005 at 1000, 1200, and 1300 to 1600 in 25MHz increments
852MHz is the stock lowest with 0.800v I didn't mess with that.
Stability testing included 1x run of unigine super and 3x runs of unigine tropics at 4K with max settings.
I crashed/locked up the system over 30x to create this over the weekend.
25MHz testing of 1000-1300 could be done for granularity, but you get the idea.
The voltage increments needed for each 25MHz above 1300 increased, and gets a little steeper above 1425

This is with the stock vegafe aircooler, stock bios at 220w, and thermal grizzly conductonaut applied. Custom aggressive fan control program (max at 60c).
This is all in linux now that voltage control works

I’ve been messing around with my Powercolor Red Devil RX Vega 56 and it’s got some interesting Voltage/Clock BIOS interplay going on.

Using the ‘Silent’ BIOS on Times Spy it

• Averages 1464mhz @ 0.98V & 192W.
• Peaks at 1521mhz @ 1.056V & 197W
• Score 6773 / Graphics Score 6504

Using the ‘Standard’ BIOS on Time Spy

• Averages 1551mhz @ 1.04V & 213W
• Peaks at 1571mhz @ 1.063V & 220W
• Score 7109 / Graphics Score 6868

Using the ‘OC’ BIOS on Time Spy

• Averages 1553mhz @ 1.04V & 223W
• Peaks at 1575mhz @ 1.056V $ 248W
• Score 7120 / Graphics Score 6885

Doing some overclocking while on the OC bios with following settings in Wattman:

• Vcore max at 1.03V
• +50% power
• 900Mhz Mem (+100mhz from base)
• 1627Mhz max core

I saw the following in the Time Spy Run:

• Average 1563Mhz @ 1.07V & 242W
• Peak 1593Mhz @ 1.094V & 271W
• Score 7295 / Graphics Score 7112

There some weird stuff going here. The card never made it to 1627 per HWINFO64 and the Vcore was well above what I set in Wattman. Mem speed did make a big difference.

Overall I’m amazed at how low the Vcore normally runs. The fact it can basically run at Vega 56 stock speeds below 1V is pretty awesome.

Maybe I should go back to the Silent bios with a Mem OC and see what score I can get. It would probably stay right around 200W. Might close the power/performance gap on the 1070Ti.

 

[Soulkeeper]

sorry I didn't respond.

I'm using linux where you change the virtual file to apply settings. Also I just figured out how to directly modify the pp_table which is essentially the same as a softmod in windows.

These are my current low power settings:
OD_SCLK:
0: 852Mhz 800mV
1: 877Mhz 825mV
2: 902Mhz 850mV
3: 952Mhz 865mV
4: 1052Mhz 870mV
5: 1127Mhz 875mV
6: 1202Mhz 880mV
7: 1227Mhz 885mV
OD_MCLK:
0: 167Mhz 800mV
1: 500Mhz 825mV
2: 800Mhz 850mV
3: 952Mhz 865mV
OD_RANGE:
SCLK: 852MHz 2400MHz
MCLK: 167MHz 1500MHz
VDDC: 800mV 1250mV

set to 130W

What i've noticed is that the hbm voltage seems to be tied to sclk P3 P2 P1, so changing the hbm voltage directly don't seem to have an effect.

My main issue with the higher clock speeds is stability, I can't really keep the thing cool or stable anywhere near the stock settings.
and it gets insanely loud.

I don't really have any power usage data to share. really busy lately.
But I can say that it is really easy to shave 50W or more off the load usage with vega.
The stock 1.20v 1600MHz is just insane

 

[DrMrLordX]

Interesting results . . .