Hashrate RX 470

[ivanpop]

So I get Polaris BIOS editor, I edit my original BIOS and flash it back to the card. And if the card doesn't start and is not seen by the computer, what should I do?

[Subw]

switch to second bios (if any)

[Grim]

I have a RX 470 Nitro and tried to set the core voltage to 950 mv but the lowest it runs at seems to be 1.000 mv.

If you set anything below 1.000 mv it isn't applied.

Anyone else noticed this?


I tried to run something like 950 mv @ 1050 mhz.
(I did mod the bios)

[blue1984]

@grim

I had the same Problem

[beks1]

Sapphire Releases TriXX Utility 6.0.0

http://www.sapphiretech.com/catapage_tech.asp?cataid=291&lang=eng

[blue1984]

Same as wattman ?

[Grim]

@grim

I had the same Problem

you had? did you solve the issue?

[Grim]

You can, but you need to offset the voltage, not use the DPM mV.

May I ask if that is true for all rx4.. cards? (reference as well as custom models)

Actually I would prefer to overwrite dpm states with true values ...

[blue1984]

@wolf0
How can i set the offset in the bios ?

[bobben2]

@wolf0
How can i set the offset in the bios ?

Hex editor.

You can, but you need to offset the voltage, not use the DPM mV.

May I ask if that is true for all rx4.. cards? (reference as well as custom models)

Actually I would prefer to overwrite dpm states with true values ...

It's actually better to offset even on other GPUs - overwriting the DPM state's index into the voltage table is a heavy-handed way to do it, IMO - better to let the offset step down the voltage.

Hi Wolf,
It sounds like you have got this right..
I am trying as well...  Could you pls shed some light on the undervolt detail?

If I look in the source code of the Polaris editor there is a data structure definition there called

unsafe struct ATOM_SCLK_ENTRY
        {
            public Byte ucVddInd;
            public UInt16 usVddcOffset;
            public UInt32 ulSclk;
            public UInt16 usEdcCurrent;
            public Byte ucReliabilityTemperature;
            public Byte ucCKSVOffsetandDisable;
            public UInt32 ulSclkOffset; // Polaris Only, remove for compatibility with Fiji
        };

So this is the table structure for the core clock values for each DPM state.
So I wrote my own utility  since undervolt editing is missing in the editor itself.
I tried to assign -16 to  usVddcOffset field in the DPM7 entry hoping to get a 100 mV undervolt, but it had no effect.
I am also curious about the ucCKSVOffsetandDisable field.  It is zero. Should be non-zero to "enable" undervolting to work?

[bobben2]

@wolf0
How can i set the offset in the bios ?

Hex editor.

You can, but you need to offset the voltage, not use the DPM mV.

May I ask if that is true for all rx4.. cards? (reference as well as custom models)

Actually I would prefer to overwrite dpm states with true values ...

It's actually better to offset even on other GPUs - overwriting the DPM state's index into the voltage table is a heavy-handed way to do it, IMO - better to let the offset step down the voltage.

Hi Wolf,
It sounds like you have got this right..
I am trying as well...  Could you pls shed some light on the undervolt detail?

If I look in the source code of the Polaris editor there is a data structure definition there called

unsafe struct ATOM_SCLK_ENTRY
        {
            public Byte ucVddInd;
            public UInt16 usVddcOffset;
            public UInt32 ulSclk;
            public UInt16 usEdcCurrent;
            public Byte ucReliabilityTemperature;
            public Byte ucCKSVOffsetandDisable;
            public UInt32 ulSclkOffset; // Polaris Only, remove for compatibility with Fiji
        };

So this is the table structure for the core clock values for each DPM state.
So I wrote my own utility  since undervolt editing is missing in the editor itself.
I tried to assign -16 to  usVddcOffset field in the DPM7 entry hoping to get a 100 mV undervolt, but it had no effect.
I am also curious about the ucCKSVOffsetandDisable field.  It is zero. Should be non-zero to "enable" undervolting to work?

Finally! Someone willing to do some research! :3

It might have had no effect because it's defined as a uint32, but actually should be interpeted as a 32-bit SIGNED integer.

Since you're the first one to actually work at the suggestion, I'll tell you this: ucCKSVOffsetandDisable is a bitmask. Bits 0 - 6 are a voltage offset, and 7 is enable/disable.

Ok,  So bits 0-6 is a 7-bit signed value?   with range -64 -- +63   
If not, then how would I get to a negative offset of say -100mV?

[Longsnowsm]

I downloaded the Trixx Sapphire app and tried it and it does not appear to give us any control over the 470 cards other than the power limit which we have under Wattman so no help at all from what I can see. It will let you slide the controls and looks like it is doing something, but you go to the hardware monitor and you will see the gpu and memory are still at stock settings.  Only the power limit made any real change in the output of the hardware monitor page.   So far Trixx is useless, we had this much control in Wattman.

[h311m4n]

Quick question: got my 2 Sapphire RX470 8Gb yesterday. How do you guys dump the BIOS? Atiflash from a bootable stick doesn't list any cards. Am I stuck using atiflash on Windows to get to the Bios on these RX4's?

[B1tUnl0ck3r]

I downloaded the Trixx Sapphire app and tried it and it does not appear to give us any control over the 470 cards other than the power limit which we have under Wattman so no help at all from what I can see. It will let you slide the controls and looks like it is doing something, but you go to the hardware monitor and you will see the gpu and memory are still at stock settings.  Only the power limit made any real change in the output of the hardware monitor page.   So far Trixx is useless, we had this much control in Wattman.

Sad to read it. However what ever a software says, I think it's better to check with a watt-meter at the wall... it's always more accurate in my opinion.

[Longsnowsm]

I downloaded the Trixx Sapphire app and tried it and it does not appear to give us any control over the 470 cards other than the power limit which we have under Wattman so no help at all from what I can see. It will let you slide the controls and looks like it is doing something, but you go to the hardware monitor and you will see the gpu and memory are still at stock settings.  Only the power limit made any real change in the output of the hardware monitor page.   So far Trixx is useless, we had this much control in Wattman.

Sad to read it. However what ever a software says, I think it's better to check with a watt-meter at the wall... it's always more accurate in my opinion.

I was hoping we would get control over gpu core and memory speeds.  It does look like the undervolt setting does something in Trixx, but appears to be the extent of it so far.  Not the kind of control I was hoping for.

[z0n0]

Are there any modified ROMs publicly shared for 470 4gb versions?

[Marvell1]

Are there any modified ROMs publicly shared for 470 4gb versions?

There are a re few but due to the fact all the cards seem so different its risky to flash them to anything but the sapphire 470s since only those
ones have dual bios

we need people to make specific roms for the

- MSI OC cards 4GB
- MSI OC cards 8GB,
- Saphire Nitro 4GB (one exists for the 8GB),
-ASUS
-XFX dual 4GB
-XFX dual 8GB
-Powercolor Devil 4GB

[ivanpop]

asus rx 470 4Gb
win7 x64
@1140core/7504gddrr5 (hynix ajr R0C)
26.5mh/s
 

Same card.
930core/7920mem
22.5mh/s

[B1tUnl0ck3r]

I downloaded the Trixx Sapphire app and tried it and it does not appear to give us any control over the 470 cards other than the power limit which we have under Wattman so no help at all from what I can see. It will let you slide the controls and looks like it is doing something, but you go to the hardware monitor and you will see the gpu and memory are still at stock settings.  Only the power limit made any real change in the output of the hardware monitor page.   So far Trixx is useless, we had this much control in Wattman.

Sad to read it. However what ever a software says, I think it's better to check with a watt-meter at the wall... it's always more accurate in my opinion.

I was hoping we would get control over gpu core and memory speeds.  It does look like the undervolt setting does something in Trixx, but appears to be the extent of it so far.  Not the kind of control I was hoping for.

A card without gpu voltage control (without bios flash or mod) is a clear no buy for me. I would even more like to be able to tweak memory voltage to get the most of the chips... be it in efficiency or raw power...

[niko2004x]

I downloaded the Trixx Sapphire app and tried it and it does not appear to give us any control over the 470 cards other than the power limit which we have under Wattman so no help at all from what I can see. It will let you slide the controls and looks like it is doing something, but you go to the hardware monitor and you will see the gpu and memory are still at stock settings.  Only the power limit made any real change in the output of the hardware monitor page.   So far Trixx is useless, we had this much control in Wattman.

Sad to read it. However what ever a software says, I think it's better to check with a watt-meter at the wall... it's always more accurate in my opinion.

I was hoping we would get control over gpu core and memory speeds.  It does look like the undervolt setting does something in Trixx, but appears to be the extent of it so far.  Not the kind of control I was hoping for.

A card without gpu voltage control (without bios flash or mod) is a clear no buy for me. I would even more like to be able to tweak memory voltage to get the most of the chips... be it in efficiency or raw power...

Easy in Linux. They have a sysfs entry that lets you control all of it through the PowerPlay table.

Here's a screen of a tool I wrote to do so (NSFW): https://ottrbutt.com/tmp/wolfamdctrl-priv.png

Needs more work and options, though.

Does it work?
I tried to change vddci and mvdd to values below 1000 (by setting new pp_table) and
according power meter and temperature measurements nothing happened.