Official R9 Graphics Card Voltage Locked/Unlocked list

[Gazza1]

Has anyone tried VBE7 on the R9 290 Reference cards?

[jhk753]

Same question here for R9 290.
Plus I'm in linux and CGminer doesn't show voltage on my card. But if I try to change the voltage, it says that driver accepted but doesn't show any change on cgminer outputs.

I'm not near my rig so I can't check the wall plug, but what do you think it means ? Is CGminer capable of undervolting in Linux with latest beta driver ?

[codon]

No one has mentioned the 270's yet.  Here's my experience:

Asus R9 270 : Unlocked.  1.100/1030/1400 = 440 kh 7 days stable.  120 W draw per card

Gigabyte R9 270: VOLTAGE LOCKED!  Tried 1.100v and 1.150v in VBE7, flashed BIOS, no errors, but the cards hang on boot when X starts.  Running stock, these cards draw 30w more per card than the Asus 270's, for a just a slight 10 kh improvement.

On top of that the Asus cards are quieter and cooler.

[gallzzy]

Sapphire Tri-X R9 280X (SKU : 11221-08-40G) VOLTAGE LOCKED! 

VBE7, modify the legacy BIOS no error, but it can't even reopen it, ERROR!
Of course system hangs with the modified BIOS. 

This card is terrible for mining. It draws 450 W at stock voltage.
On the box, it said use 750 W for one card.
I am stuck with 3 of this KW hungry monsters!

[G K G]

Sapphire Tri-X R9 280X (SKU : 11221-08-40G) VOLTAGE LOCKED! 

VBE7, modify the legacy BIOS no error, but it can't even reopen it, ERROR!
Of course system hangs with the modified BIOS. 

This card is terrible for mining. It draws 450 W at stock voltage.
On the box, it said use 750 W for one card.
I am stuck with 3 of this KW hungry monsters!

oooooh! pity. when i bought my vaporX i was tempted to buy those, all fancy with three fans. only the price diff saved me. 

[broken_pixel]

Add to unlocked:

XFX 290X- R9- 290X- ENFC 835Kh/s @ 860/1250 -25mV
MSI 7970L- 606-V278 645KH/s @ 840/1600 1.056mV
MSI 7970L/BE in RMA forgot model # 755KH/s @ 1080/1500 1.119mV

[jorm1s]

Sapphire r9 280x Vapor-x

Was unable to undervolt in afterburner but trixx and VBE7 worked great.

Now stable in my BAMT rig @ 750kh/s, 1080/1500, 1075mV
About a 70w drop in power draw per card

EDIT: exact version of the gpu is R9 280X Vapor-x 11221-02-40G

[Wipeout2097]

Gigabyte R9 270: VOLTAGE LOCKED!   Tried 1.100v and 1.150v in VBE7, flashed BIOS, no errors, but the cards hang on boot when X starts.  Running stock, these cards draw 30w more per card than the Asus 270's, for a just a slight 10 kh improvement.

Gigabyte R9 270: Modable with VBE7

I'm running 2 at 1.043V and hashing at 475 Kh/s and 445 Kh/s on W7 and Catalyst 13.12 without any issues. Hanging on boot on your rig or OS installation is no evidence whatsoever that they are voltage locked. Perhaps you forgot to set also a lower clock speed on VBE7

[Gazza1]

Updated, Good job guys

[G K G]

Asus r9 280x DC2T 1100mV with Asus GPU tweak - thats the lowest it allows.

At stock voltage(1200mV) the temp gets too hot and goes beyond 85. But at 1.1V it gives 753Kh/s at 71 C

[Gazza1]

How about the 280x MSI?  Anybody have any VBE7 results to report?  One guy around here was reporting he couldn't get the voltage to change even after flashing the modded bios.  Anyone have anything different to report?

[whoopdee]

No one has mentioned the 270's yet.  Here's my experience:

Asus R9 270 : Unlocked.  1.100/1030/1400 = 440 kh 7 days stable.  120 W draw per card

Gigabyte R9 270: VOLTAGE LOCKED!  Tried 1.100v and 1.150v in VBE7, flashed BIOS, no errors, but the cards hang on boot when X starts.  Running stock, these cards draw 30w more per card than the Asus 270's, for a just a slight 10 kh improvement.

On top of that the Asus cards are quieter and cooler.

Same question here for R9 290.
Plus I'm in linux and CGminer doesn't show voltage on my card. But if I try to change the voltage, it says that driver accepted but doesn't show any change on cgminer outputs.

i have some asus R9 270(non x)s with the cuII cooler or whatever...  same.. when i enter in values running, or spec them in cgminer config, it still displays in as original volts, but doesnt report any failure, also heat and hash are unaffected.

its there some trick to dropping the voltage with these?            linux.

[jorm1s]

i have some asus R9 270(non x)s with the cuII cooler or whatever...  same.. when i enter in values running, or spec them in cgminer config, it still displays in as original volts, but doesnt report any failure, also heat and hash are unaffected.

its there some trick to dropping the voltage with these?            linux.

Unfortunately the amd drivers in linux don't allow you to modify the voltages through software.

BUT there is a guide linked in the main post that makes it pretty easy to do the undervolting via modifying the card's bios.

[metraque]

I have an Asus R9 280x DC2T and I was able to modify the voltage via cgminer (or vertminer) on linux, but I wasn't with an MSI R9 280X GAMING 3G (not sure of the model). Does it means that software undervolting is possible?

Thanks!

[davzilla]

Sapphire Tri-X R9 280X (SKU : 11221-08-40G) VOLTAGE LOCKED!  

VBE7, modify the legacy BIOS no error, but it can't even reopen it, ERROR!
Of course system hangs with the modified BIOS.  

This card is terrible for mining. It draws 450 W at stock voltage.
On the box, it said use 750 W for one card.
I am stuck with 3 of this KW hungry monsters!

i just flashed my 2 Sapphire 280x Toxics using VBE7, i flashed the UEFI bios though (press the button near the crossfire connector so it lights up blue), not the legacy, works fine both cards stable at ~750kh/s each @ 1.1v. I might try dropping the voltage further, but pretty happy with the results at 1.1v

also my whole system was only drawing ~525w running windows off an SSD, might be lower now that i'm running linux bamt 1.3 off a USB 3.0 drive. My PSU is a Corsair AX860i, mobo is asus M5A99X Evo R2.0 with a Sempron 145 CPU.

the hardware comparison guide says they only draw 253w eac, and that's about what i'm seeing, not sure what's up with your system.

[busminer]

davzilla
Can you post you bios hare or send it to me ? i have same card but dont now what settings in VBE7 should i change?thanks.

[Stan-O]

No one has mentioned the 270's yet.  Here's my experience:

Asus R9 270 : Unlocked.  1.100/1030/1400 = 440 kh 7 days stable.  120 W draw per card

Gigabyte R9 270: VOLTAGE LOCKED!   Tried 1.100v and 1.150v in VBE7, flashed BIOS, no errors, but the cards hang on boot when X starts.  Running stock, these cards draw 30w more per card than the Asus 270's, for a just a slight 10 kh improvement.

On top of that the Asus cards are quieter and cooler.

that's odd.  my gigabyte 270's undervolt just fine.  i went down to 1.131 using VBE7.  They now run 10-15c cooler than stock.
no hanging, no errors.  same 480-485KH hashrate, as they did with stock voltage.  1130/1500  tc-15232 -I 19   -g 1  -w 128

btw... someone needs to update VBE7 to run on Win8.1.  sucks having to have a win7 VM just to play with GPU BIOS.

[machasm]

The MSI TF Gaming 280x cards CANNOT be modifed at this point in time (very limited voltage modding allowed as described below).
Although it would appear that using VBE7 and atiflash looks like it changes the voltage (shows in GPU-Z and in cgminer as new lower voltage), If measured on the card you will find no change.
This is true for card versions 3SB and above (2SB cards can be modified in this way).
The only voltage that does work is 0.943 V (Dont ask me why?).
The only drawback with this voltage is that you wont be able to hash anywhere near 700K you might get 650K at best.
So until MSI release an editable BIOS (if ever) or another tool is created that can edit it we are stuffed!
I have 3 X 3SB cards and 1 X 2SB card.
You may want to update the OP to reflect that these cards are not unlocked.

[Stan-O]

for Linux under volting, here's the guide to UV vias BIOS.  BIOS reflashing is the only way i've heard of undervolting being done when using linux.  cgminer/bfgminer/vertminer let you make the changes, but the changes dont stick.

here's the link.  http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/#more-767

VBE7  requires windows 7.  it will open on win8/8.1, but you cannot make any changes.  i tried.  doesnt work.  lol

[sueche]

The MSI TF Gaming 280x cards CANNOT be modifed at this point in time (very limited voltage modding allowed as described below).
Although it would appear that using VBE7 and atiflash looks like it changes the voltage (shows in GPU-Z and in cgminer as new lower voltage), If measured on the card you will find no change.
This is true for card versions 3SB and above (2SB cards can be modified in this way).
The only voltage that does work is 0.943 V (Dont ask me why?).
The only drawback with this voltage is that you wont be able to hash anywhere near 700K you might get 650K at best.
So until MSI release an editable BIOS (if ever) or another tool is created that can edit it we are stuffed!
I have 3 X 3SB cards and 1 X 2SB card.
You may want to update the OP to reflect that these cards are not unlocked.

Have you seen this article
and this one too ?