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Preliminary view of AMD VEGA Bios - Page 26

post #251 of 821
Quote:
Originally Posted by Blameless View Post

That's pretty odd...

Why would disabling voltage islands, which is a power saving feature, enable overvoltage?

maybe it didn't and overvoltage is renabled by AMD? OMG.. still, Polaris SoftPowerPlay overvoltage is working.. i check if it was me or not biggrin.gif

thx for telling me thumb.gif

update:
and it wasn't me.. i works again. ok, no need for that key then, but it wasn't all bull....

you have to hit manual voltage on wattman, and apply. afterwards, you can mod the VDDCLookup table, and on the next reboot, this will be the maximum voltage. But not before manual voltage is triggered.

again, i don't have a Vega.. someone needs to test this

update2:
still this is for the new 17.7.2 driver

..and AMD might have thrown us some candy.

as soon as manual setting is triggered in wattman, SoftPowerPlay completely overrides it all. This has the side effect, that clockrates can not be changed! Only by editing the SoftPowerPlay registry binary.

Means, if you want to run a high voltage with a high clockrate, you have to apply the voltage first, reboot, hit manual voltage, and then edit the core clock in the SoftPowerPlay table. but it works. smile.gif
Edited by hellm - 8/20/17 at 8:13pm
post #252 of 821
Thanks for the retest and clarification, hellm.

Hopefully I'll be getting my hands on a Vega 56 soon. When I do I'll be happy to test any registry modifications in question. Ideally I'd like to be able to control power limits, VID per DPM, clocks, and HBM voltage. I've been doing this on my Hawaii and Fiji parts with the firmware editing tools provided by gupsterg and others, but have been discouraged about the chances of being able to do the same with Vega due to the firmware lock. These discoveries about the extent of what the softpowerplay tables are capable of is giving me renewed hope.
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post #253 of 821
I will try to make this easy for everyone. Here is a little How-to.

First of all, you will have to check [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\, if the card is installed under 0000. fix this (Click to show)
Run a clean deinstall with DDU in safe mode (Safe Mode W10)
Open regedit (right click start -> run) and goto HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}. If there is more than the 0000 entry, use DDU again and select intel or/and nvidia driver to be removed.
Of course, you could also edit the .reg file.

Open Wattman and reset first if you did anything there, set "Voltage Control" to manual, then apply. This is to prevent any instability upon the next reboot.

Now, download the registry file for your Vega:
MorePowerVega56.zip 1k .zip file
MorePowerVega64.zip 1k .zip file
MorePowerVega64LC.zip 1k .zip file
MorePowerVegaFE.zip 1k .zip file
MorePowerVegaFELC.zip 1k .zip file

Open the file by right click -> edit.
The voltages are found at the exact same place for all of the Vega cards, and the values are also the same.
For P-State 7 Vcore:

B0 04 -> 0x4B0 -> 1200mV
examples:
C9 04 -> 0x4C9 -> 1225mV
E2 04 -> 0x4E2 -> 1250mV
FB 04 -> 0x4FB -> 1275mV
...
For the HBM voltage the 56 version has a lower voltage, which is also the version i am using here.

E2 04 -> 0x4E2 -> 1250mV (56)
46 05 -> 0x546 -> 1350mV (FE, 64)

For the clockrates, easiest way is to search for the hex-value, i guess. P-State 7 clockrate should also be followed by 00 07.

00 71 02 -> 0x27100 -> 160000 -> 1600MHz (FE)
18 6D 02 -> 0x26D18 -> 159000 -> 1590MHz (56)
You have to multiplicate with 100, take the hex value and reverse it to "little endian".

Same goes for the memory.
Vega 56:

80 38 01 -> 0x13880 -> 80000 -> 800MHz
Vega FE (64):

24 71 01 -> 0x17124 -> 94500 -> 945MHz

this probably wouldn't make much sense if you don't raise the powerlimit.
max power limit (+50% = 0x32) for all Vega cards:
TDP, TDC... (Click to show)
56:

A5 00 -> 0xA5 -> 165W Socket PowerLimit
A5 00 -> 0xA5 -> 165W Battery PowerLimit
A5 00 -> 0xA5 -> 165W Small PowerLimit
2C 01 -> 0x12C -> 300A Tdc Limit
64:

FE:

DC 00 -> 0xDC -> 220W Socket PowerLimit
DC 00 -> 0xDC -> 220W Battery PowerLimit
DC 00 -> 0xDC -> 220W Small PowerLimit
2C 01 -> 0x12C -> 300A Tdc Limit
64 LC:

FE LC:

08 01 -> 0x108 -> 264W Socket PowerLimit
08 01 -> 0x108 -> 264W Battery PowerLimit
08 01 -> 0x108 -> 264W Small PowerLimit
2C 01 -> 0x12C -> 300A Tdc Limit

When you are done -> save file -> double click to add it to the registry.

reboot.

Your clockrates will be still at stock, as will be the voltages, cause you applied them previously. So, open Wattman, and hit the reset butten; don't close Wattman, you have to change Voltage Control to manual again and then apply.

Done! The voltages and the clockrates you entered in SoftPowerPlay should work now.

To adjust voltages just edit the SoftPowerPlay again and add it to the registry. For the clockrates, you have to reset with Wattman first and then apply manual voltage setting again.

+142% power limit, 220W, 400A
MorePowerVega56_142.zip 1k .zip file
MorePowerVega64_142.zip 1k .zip file

only for very good cooling solutions, not stock aio, the lower shutdown temp is to prevent the pump from taking damage!
+142% power limit, 264W, 400A, shutdown temp 89°C (=56,64)
MorePowerVega64LC_142.zip 1k .zip file
Edited by hellm - Yesterday at 2:49 am
post #254 of 821
Thanks Hellm for the help. I can verify that these reg edits work with the latest beta FE driver. I have no way to really test whether or not the voltage increase is doing anything though, but it is applying and showing in watttool. Since the latest beta driver does not include wattman I have been using the latest afterburner beta to adjust fan curves, which is also showing clock speeds set in registry. At 1.3Volts and 200% power limit I still can't hit 1750mhz stable, my guess is that the voltage setting isn't actually doing anything but I have not probed the card to verify, either that or my gpu maxes out around 1730mhz. I'll continue testing.
post #255 of 821
WattTool is also able to set those voltages. At least with Polaris. You can't change the voltage u entered in SoftPowerPlay there, too.
Again, you first have to apply them, before this works.
Edited by hellm - 8/23/17 at 5:35am
post #256 of 821
Does anyone on here have an RX Vega yet? Need to confirm whether RX series has (hopefully does not have) same hardware BIOS check that Vega FE does.
post #257 of 821
Quote:
Originally Posted by ba1b0a View Post

Thanks Hellm for the help. I can verify that these reg edits work with the latest beta FE driver. I have no way to really test whether or not the voltage increase is doing anything though, but it is applying and showing in watttool. Since the latest beta driver does not include wattman I have been using the latest afterburner beta to adjust fan curves, which is also showing clock speeds set in registry. At 1.3Volts and 200% power limit I still can't hit 1750mhz stable, my guess is that the voltage setting isn't actually doing anything but I have not probed the card to verify, either that or my gpu maxes out around 1730mhz. I'll continue testing.

What temps are you hitting?

For 1750 I think you will need like 40-50C on the core.
post #258 of 821
Ah, they might explain why it is stable at first but crashes after a little warmup. My fan profiles are keeping temps below 65 under heavy load.
post #259 of 821
Thank you very much hellm ! thumb.gif

I can confirm those regmods work on Vega64 with the latest 17.8.1 driver from 22.08.
I have got a Vega 64 Liquid and did not overclock but undervolted and kept its clockrates at default.

Managed to get as low as 950mv@1750mhz. Checked it with the power monitor of my AX760i.
I had to set all clocks down to the lowest wanted voltage or it would not undervolt any further. In case of Vega64 P5 is 1050mv, so nothing lower than that applies. You can set it but it does not do anything. If you modify the powerplay entry for P5 so it is 1000mv, P6 and P7 can be undervolted to 1000mv, If you want to go even lower you have to change P4 to 950mv and so on.

Power consumption improved drastically.
It now consumes around 280W at uncapped OCCT 2560x1080 DirectX11 Level7 Errorcheck. Before undervolt it would consume 390W and downclock to 1402mhz
If anyone knows a program that can squeeze even more power from graphicscards, please let me know. To my knowledge this is the highest I can get.
Clocks are 1750mhz and +50% PT with no dips, steady flat line.

Battlefield 1 maxed out at 99%GPU load consumes around 200W. biggrin.gif


My lowest was 900mv@1700mhz stable but then HBM downclocks to 800mhz and can´t be raised again. At least not really only cosmetically. It shows 945mhz if you exchange the next lowest HBM clocks with the max HBM clock in the powerplay table. But comparing performance it is the same as 800mhz HBM.
My guess is that HBM voltage is somehow linked to minimal core voltage, since at 900mv core wattman sets 900mv HBM voltage automatically.
Maybe the driver thinks it is a Vega56 now?rolleyes.gif
post #260 of 821
*deleted - double post*
Edited by Nuke33 - 8/23/17 at 5:14pm
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