R9 Nano Modded Rom

[RastoMan]

OP, in the XFX BIOS, how do you change the memory voltage?

Does the memory voltage change when the frequency change, like the VCore?

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[citronick]

ellovp - have you tried 8 x GPU setup.

I am thinking of doing this using 3 to 1 PCI riser on the 6th PCI slot.

That should get the MHs above 200MHs per rig.

Thoughts?

I am going using Claymore Dual miner for this rig.

thanks

I haven't tried with my nano's, i have tried to use a pci hub/splitter in the past, i still have 2 of them though.

Maybe i'll play with them again sooner or later.

But like it is now, 6 per rig is more than enough

+ i would need an extra PSU.. nahh i'm fine like this :p

I have EVGA 1600w G2, and I will work on the 8 x GPU version (246MH/s rig!!!) - I will post results soon.

I am still waiting for DHL to knock on my door...

I don't think you'll have enough PCI power connectors to connect all 8 Gpu's.... "could be wrong though.."

Anyhow, even if you do, the psu won't be able to bring enough power to all those rails. "again, could be wrong.."

I tried latest driver 16.5.2, still the same behavior.  May I know which driver are you using?

Try to boot with only 1 nano connected to your mobo and see what that gives you

You may right on the number of VGA cables, I need to check the PSU later tonight otherwise this 8 GPU monster even using the mod will need 2 x PSUs because of lack of cables points.

[ldw-com]

OP, in the XFX BIOS, how do you change the memory voltage?

Does the memory voltage change when the frequency change, like the VCore?

i change it by adding the vddc and mvddc offset in the rom, this because it's standard not there.

Same goes for Fiji, VDDC and MVDDC offset are not standard in the rom, i had to add those myself.

The voltage changes when the frequency changes yes. In other words, that voltage is reduced from every DPM state. Unlike changing every DPM state manually, the voltage controller does this automatically in my case

You may right on the number of VGA cables, I need to check the PSU later tonight otherwise this 8 GPU monster even using the mod will need 2 x PSUs because of lack of cables points.

You mean PCI power cables right?

You'll probably need 2 PSU's yes

[Gestinar]

OP, in the XFX BIOS, how do you change the memory voltage?

Does the memory voltage change when the frequency change, like the VCore?

i change it by adding the vddc and mvddc offset in the rom, this because it's standard not there.

Same goes for Fiji, VDDC and MVDDC offset are not standard in the rom, i had to add those myself.

The voltage changes when the frequency changes yes. In other words, that voltage is reduced from every DPM state. Unlike changing every DPM state manually, the voltage controller does this automatically in my case

So the MVDDC changes when the memory frequency changes? If the frequency is reduced from 1500 MHz to 1000 MHz, how much voltage change?

[ldw-com]

OP, in the XFX BIOS, how do you change the memory voltage?

Does the memory voltage change when the frequency change, like the VCore?

i change it by adding the vddc and mvddc offset in the rom, this because it's standard not there.

Same goes for Fiji, VDDC and MVDDC offset are not standard in the rom, i had to add those myself.

The voltage changes when the frequency changes yes. In other words, that voltage is reduced from every DPM state. Unlike changing every DPM state manually, the voltage controller does this automatically in my case

So the MVDDC changes when the memory frequency changes? If the frequency is reduced from 1500 MHz to 1000 MHz, how much voltage change?

Yup, memory controller will reduce or raise the voltage needed for a specific frequency. Kind of like vddc but different.

I don't know how much that is though.


Example:

BIOS PowerPlay State #0:
- Level #0: GPUClock = 1040 MHz, MemClock = 1500 MHz, VID = 4.098 V  (Boot)
BIOS PowerPlay State #1:
- Level #0: GPUClock =  300 MHz, MemClock =  150 MHz, VID = 0.256 V
- Level #1: GPUClock = 1040 MHz, MemClock = 1500 MHz, VID = 4.098 V

------[ ADL GPU Info ]------

Part Number  = 113-2E3243U-X4J
BIOS Version = 015.049.000.004
BIOS Date    = 2015/08/25 04:11
Memory Type  = GDDR5
GPU Clock    = 1040 MHz
Memory Clock = 1500 MHz
VDDC         = 0 mV
DPM State    = 0
GPU Usage    = 22 %

------[ ADL PStates List ]------

State #0: GPUClock =  300 MHz, MemClock =  150 MHz, VID = 0.000 V
State #1: GPUClock = 1040 MHz, MemClock = 1500 MHz, VID = 0.000 V

------[ GPU PStates List ]------

DPM0: GPUClock =  300 MHz, VID = 1.00000 V
DPM1: GPUClock =  500 MHz, VID = 0.95600 V
DPM2: GPUClock =  698 MHz, VID = 0.96800 V
DPM3: GPUClock =  858 MHz, VID = 1.08700 V
DPM4: GPUClock =  899 MHz, VID = 1.13100 V
DPM5: GPUClock =  935 MHz, VID = 1.16200 V
DPM6: GPUClock =  969 MHz, VID = 1.20000 V
DPM7: GPUClock = 1040 MHz, VID = 1.27500 V

Check the lines i made bold. The values in between are calculated by the memory voltage controller.
The only thing i "could" do here is lower the stock mvddc, but in this case, (check second bold lines) it's not possible.

Greetings

[asrilani]

That is from the Sapphire R9 390 1040 MHz card.

Can you change the MVDDC with the XFX 1015 MHz card? How much?

[ldw-com]

That is from the Sapphire R9 390 1040 MHz card.

Can you change the MVDDC with the XFX 1015 MHz card? How much?

Yeah that's from the sapphire 390 nitro card.

I'm not sure, haven't really checked that out yet. Took a registerdump and ic2dump to see what i'm dealing with but haven't had the time yet to see if i'm able to add the offsets for vddc and mvddc as they're not in the rom. Kind of like the fiji roms.

Have to check if i can modify that, but i think so. Will report back later regarding that.

[gupsterg]

i change it by adding the vddc and mvddc offset in the rom, this because it's standard not there.

Same goes for Fiji, VDDC and MVDDC offset are not standard in the rom, i had to add those myself.

Hmmm .... seems like I wasn't the first to create/release these ROMs?  .

[ldw-com]

i change it by adding the vddc and mvddc offset in the rom, this because it's standard not there.

Same goes for Fiji, VDDC and MVDDC offset are not standard in the rom, i had to add those myself.

Hmmm .... seems like I wasn't the first to create/release these ROMs?   .

Couldn't have done it without you . Wouldn't even know where to start if it wasn't for you

Check the op

Some old info and blabla:

Hey,

As we all know, the R9 Nano is one of the most energy efficient GPU's out there at this moment.

In the past months i've done numerous of tests on how to get this card as stable and as power efficient as possible.

I've been thinking about sharing my results and tests and came to the conclusion to keep it short and as helpful as possible for every Nano owner out there.

I modded my Sapphire Nano rom (with A LOT of help from Gupsterg) to the point that it almost dropped 50% in power usage at the same speed  

And i would like to share that.

Please be careful. (you have a secondary bios switch, so you can always switch back)



For all the *nix users out there. This might be very interesting for you guys because i know what a hassle it is to change voltage in linux. Yeah.. not...

Also, if you want to flash in Linux, that isn't possible right now. You'll need Windows. (And not a bootable version! Won't work on Fiji..)

Enjoy!

Changed the "someone" part to Gupsterg now that you're here

[gupsterg]

Couldn't have done it without you . Wouldn't even know where to start if it wasn't for you

No worries   , I also appreciated your participation.

So Eliovp = ldw-com?

Check the op, Changed the "someone" part to Gupsterg now that you're here

No worries .

[ldw-com]

Couldn't have done it without you . Wouldn't even know where to start if it wasn't for you

No worries   , I also appreciated your participation.

So Eliovp = ldw-com?

Yup, Eliovp = personal for when i'm at home (or on my phone)
Ldw-com is when i'm at work/warehouse

Check the op, Changed the "someone" part to Gupsterg now that you're here

No worries .

Expect your inbox to get flooded now that there is someone else to contact

[gupsterg]

Yup, Eliovp = personal for when i'm at home (or on my phone)
Ldw-com is when i'm at work/warehouse

Cool , I thought somehow I'd been hacked  as I was reading 2 members posting things that only 1 could know  , then I thought perhaps their friends. So I thought I gotta register and ask  .

Expect your inbox to get flooded now that there is someone else to contact

Hmmm, I'll just have to not reply  . Been off and on lurking here, mainly to read things the Stilt has posted TBH.

[lawrencelyl]

I'm wondering how difficult is it to create a Nano rom with -120mV core voltage?  With memory voltage at -175mV.
Fiji bios editor doesn't have the option to change voltage I think.  Have to edit the the rom through hex editor?
I think my Nano is pretty stable at -120mV core voltage.

[Eliovp]

I'm wondering how difficult is it to create a Nano rom with -120mV core voltage?  With memory voltage at -175mV.
Fiji bios editor doesn't have the option to change voltage I think.  Have to edit the the rom through hex editor?
I think my Nano is pretty stable at -120mV core voltage.

Not "so" difficult..

Yes with an hex editor.

If you want, i can make you one...

Greetings!

Yup, Eliovp = personal for when i'm at home (or on my phone)
Ldw-com is when i'm at work/warehouse

Cool , I thought somehow I'd been hacked  as I was reading 2 members posting things that only 1 could know  , then I thought perhaps their friends. So I thought I gotta register and ask  .

Expect your inbox to get flooded now that there is someone else to contact

Hmmm, I'll just have to not reply  . Been off and on lurking here, mainly to read things the Stilt has posted TBH.

Nah, it's all me :-)

Haven't seen the stilt here in a Long time tough..

Maybe now you're here he'll pop up ;-)

[lawrencelyl]

I'm wondering how difficult is it to create a Nano rom with -120mV core voltage?  With memory voltage at -175mV.
Fiji bios editor doesn't have the option to change voltage I think.  Have to edit the the rom through hex editor?
I think my Nano is pretty stable at -120mV core voltage.

Not "so" difficult..

Yes with an hex editor.

If you want, i can make you one...

Greetings!

Yup, Eliovp = personal for when i'm at home (or on my phone)
Ldw-com is when i'm at work/warehouse

Cool , I thought somehow I'd been hacked  as I was reading 2 members posting things that only 1 could know  , then I thought perhaps their friends. So I thought I gotta register and ask  .

Expect your inbox to get flooded now that there is someone else to contact

Hmmm, I'll just have to not reply  . Been off and on lurking here, mainly to read things the Stilt has posted TBH.

Nah, it's all me :-)

Haven't seen the stilt here in a Long time tough..

Maybe now you're here he'll pop up ;-)

I'll really appreciate it if you can make one

[lawrencelyl]

I think I got it after googling around and comparing the rom that you made.
8D 00 F0 00 8E 00 E4 00

8D 00 F0 00 = offset for core voltage
Value F0 basically -16 * 6.25mV = -100mV

8E 00 E4 00 = offset for HBM voltage
Value E4 basically -28 * 6.25mV = -175mV

So, to further reduce core voltage, I assume just need to reduce F0 to EC so I'll get -125mV.

[Eliovp]

I think I got it after googling around and comparing the rom that you made.
8D 00 F0 00 8E 00 E4 00

8D 00 F0 00 = offset for core voltage
Value F0 basically -16 * 6.25mV = -100mV

8E 00 E4 00 = offset for HBM voltage
Value E4 basically -28 * 6.25mV = -175mV

So, to further reduce core voltage, I assume just need to reduce F0 to EC so I'll get -125mV.

Yup, you're right!

Are you going to be able to do it? Or shall i help?

Remember to open your edited rom with fiji bios editor and save it with that to fix checksum.

Greetings

[lawrencelyl]

I think I got it after googling around and comparing the rom that you made.
8D 00 F0 00 8E 00 E4 00

8D 00 F0 00 = offset for core voltage
Value F0 basically -16 * 6.25mV = -100mV

8E 00 E4 00 = offset for HBM voltage
Value E4 basically -28 * 6.25mV = -175mV

So, to further reduce core voltage, I assume just need to reduce F0 to EC so I'll get -125mV.

Yup, you're right!

Are you going to be able to do it? Or shall i help?

Remember to open your edited rom with fiji bios editor and save it with that to fix checksum.

Greetings

I'll attempt to make one, will report back if it works

[lawrencelyl]

Okay...mission failed.
Successfully created rom with -125mV core voltage but upon starting mining, GPU crashed.
However, if I only reduce the voltage in the midst of mining, then it works fine.  I'm guessing the starting voltage is too low perhaps.
I'm still trying to figure out how to reduce just the DPM7 voltage instead of a generic negative offset to all DPM.  Any pointer, Eliovp?

[Eliovp]

Okay...mission failed.
Successfully created rom with -125mV core voltage but upon starting mining, GPU crashed.
However, if I only reduce the voltage in the midst of mining, then it works fine.  I'm guessing the starting voltage is too low perhaps.
I'm still trying to figure out how to reduce just the DPM7 voltage instead of a generic negative offset to all DPM.  Any pointer, Eliovp?

Hey mate,

Yeah, i had the same problems (booting issues), that's why i don't have any roms with lower core voltage than 100mV. when boot is done, you can still lower it with ab or trixx.. so that is what i do

Open Fiji editor and give the DPM's a fixed state. That'll work just fine as well.

It's a little more difficult because the controller won't be auto calculating those voltages anymore and will just use what you stated.

So in some cases it won't be enough.

Good luck!