Pages:
Author

Topic: R9 Nano Modded Rom - page 20. (Read 60873 times)

legendary
Activity: 1050
Merit: 1293
Huh?
May 18, 2016, 01:45:37 PM
Been playing around with a stack of new nanos i got question for you Eliovp

great work by the way on the nano roms , I dont mind losing a few hashes to save almost 500 watts per rig lol

what is the difference between the -125 , -175 and -200 roms power ussage wise ?

I dont see much difference in hash rate at all basically none , and power usage going from the -175 to the -200 was not noticable ?

I know you said temps are better but temps seem the same to me.

thanks


Hey Marvel1,

Thx, me neither, the energy was more important for me Smiley

The difference is basically only the supplied voltage for the memory.

So no, you won't see a lot of difference, but a little none the less.

Don't know if you tried already, but now that you're using stock -100mV core, you can still go lower, i have a lot of cards that are running for months @ -125mV and )112mV. There are a few that can't handle this that are @ -106mV.

That'll bring down your power usage down even more!

If you set your memory (as it is in the rom) to 300, the difference won't be large, but if you use stock memory (500), the card will stay a lot cooler and a lot more energy efficient. Although that i doubt that your cards can handle -175mV MVDDC  when your memclock is at 500. (mine won't stay stable.)

Greetings!
legendary
Activity: 2408
Merit: 1102
Leading Crypto Sports Betting & Casino Platform
May 18, 2016, 03:20:21 AM
Been playing around with a stack of new nanos i got question for you Eliovp

great work by the way on the nano roms , I dont mind losing a few hashes to save almost 500 watts per rig lol

what is the difference between the -125 , -175 and -200 roms power ussage wise ?

I dont see much difference in hash rate at all basically none , and power usage going from the -175 to the -200 was not noticable ?

I know you said temps are better but temps seem the same to me.


thanks

sr. member
Activity: 428
Merit: 250
Inactivity: 8963
May 18, 2016, 01:37:00 AM
In my opinion it's because of voltage ripple of VRM when GPU is changing power state.
full member
Activity: 201
Merit: 100
May 16, 2016, 01:06:32 AM
It is the same with AMD R9 390. It can run at 1000 MHz, but when it starts, it needs 990 MHz. Any reason for that?
legendary
Activity: 1050
Merit: 1293
Huh?
May 15, 2016, 04:06:06 AM
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 Smiley

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! Smiley

member
Activity: 94
Merit: 10
May 14, 2016, 09:40:17 PM
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?
member
Activity: 94
Merit: 10
May 14, 2016, 08:15:43 PM
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! Smiley

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 Cheesy
legendary
Activity: 1050
Merit: 1293
Huh?
May 14, 2016, 10:30:41 AM
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! Smiley

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
member
Activity: 94
Merit: 10
May 14, 2016, 10:16:36 AM
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.
member
Activity: 94
Merit: 10
May 14, 2016, 09:45:45 AM
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. Smiley

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 Smiley

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

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

Hmmm, I'll just have to not reply  Tongue. 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 Tongue
legendary
Activity: 1050
Merit: 1293
Huh?
May 14, 2016, 08:24:36 AM
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. Smiley

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 Smiley

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

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

Hmmm, I'll just have to not reply  Tongue. 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 ;-)
member
Activity: 94
Merit: 10
May 14, 2016, 07:51:45 AM
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. Smiley
newbie
Activity: 8
Merit: 0
May 14, 2016, 06:08:09 AM
Yup, Eliovp = personal for when i'm at home (or on my phone)
Ldw-com is when i'm at work/warehouse Smiley

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

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

Hmmm, I'll just have to not reply  Tongue. Been off and on lurking here, mainly to read things the Stilt has posted TBH.
full member
Activity: 229
Merit: 100
May 14, 2016, 05:57:41 AM

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

No worries  Smiley , 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 Smiley

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

No worries Smiley .
Expect your inbox to get flooded now that there is someone else to contact Cheesy
newbie
Activity: 8
Merit: 0
May 14, 2016, 05:53:17 AM

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

No worries  Smiley , I also appreciated your participation.

So Eliovp = ldw-com?



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

No worries Smiley .
full member
Activity: 229
Merit: 100
May 14, 2016, 05:02:17 AM
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?  Wink .

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

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  Grin

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 Smiley
newbie
Activity: 8
Merit: 0
May 14, 2016, 04:58:59 AM
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?  Wink .
full member
Activity: 229
Merit: 100
May 13, 2016, 08:06:42 AM
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.
full member
Activity: 206
Merit: 100
May 13, 2016, 06:59:23 AM
That is from the Sapphire R9 390 1040 MHz card.

Can you change the MVDDC with the XFX 1015 MHz card? How much?
full member
Activity: 229
Merit: 100
May 13, 2016, 04:57:55 AM
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 Smiley


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:
Quote
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. Smiley

Greetings
Pages:
Jump to: