7970 undervolting | Bitcointalksearch.org

cryptmebro

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Quote from: drakoin on December 29, 2013, 10:41:31 PM

Quote from: crazyates on September 11, 2012, 04:49:46 PM

If that doesn't work, your BIOS is voltage locked.

And what do I need to do then??

I have:
1 PowerColor HD 7850 (AX7850 2GBD5-DH) with 85.3% ASIC quality
1 XFX R7970 DD (FX-797A-TDFC) with 68.6% ASIC quality

How to unlock the voltage control?

Thanks!

http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/
http://www.freedos.org/download/
http://www.techpowerup.com/downloads/2306/atiflash-4-17/
OR you can skip freedos and get ATIwinflash instead.
http://www.techpowerup.com/downloads/2311/ati-winflash-2-6-7/

ATIflash (dos version)
Important, so you don't flash the wrong card/bios (not necessary for winflash.)
http://www.techpowerup.com/forums/threads/how-to-use-atiflash.57750/
I used the command: "atiflash.exe -p 1 xxxx.rom -f " to flash my second card. This was all that was needed for a Sapphire 7950. Be sure to do atiflash.exe -i OR -ai to get adapter information to be sure you are flashing the correct card.

drakoin

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Quote from: crazyates on September 11, 2012, 04:49:46 PM

If that doesn't work, your BIOS is voltage locked.

And what do I need to do then??

I have:
1 PowerColor HD 7850 (AX7850 2GBD5-DH) with 85.3% ASIC quality
1 XFX R7970 DD (FX-797A-TDFC) with 68.6% ASIC quality

How to unlock the voltage control?

Thanks!

Mousepotato

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Quote from: crazyates on September 11, 2012, 04:49:46 PM

Quote from: Mousepotato on September 11, 2012, 04:47:50 PM

Wait, how are you guys undervolting with MSI Afterburner? My voltage slider is blank... is there some option/setting I have to turn on or something?

Go to settings, and unlock voltage control.

If that doesn't work, your BIOS is voltage locked.

Thanks, I'll try that when I get home, though I'm afraid it's the case of the latter.

crazyates

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Quote from: Mousepotato on September 11, 2012, 04:47:50 PM

Wait, how are you guys undervolting with MSI Afterburner? My voltage slider is blank... is there some option/setting I have to turn on or something?

Go to settings, and unlock voltage control.

If that doesn't work, your BIOS is voltage locked.

Mousepotato

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Wait, how are you guys undervolting with MSI Afterburner? My voltage slider is blank... is there some option/setting I have to turn on or something?

btcnut

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Quote from: jjiimm_64 on May 13, 2012, 01:01:16 PM

I am running them at 930/800/0.937v

downvolt with msiafterburner, close AB start cgminer with conf file.

pulling 830watts at the wall. 3.33 Mh/watt

Code:

cgminer version 2.3.6 - Started: [May 10, 2012, 8:52 am]    Rig:miner19
(5s):2772.32  (avg): 2759.81 Mh/s  |    H: 86.8  Q:168959   A:173544   R:927   HW:113   E:?%   U:38.07/m
TQ:?   ST:143   SS:?   DW:5646   NB:424   LW:80863   GF:222   RF:169
Connected to http://gpumax.com:8332 with LP as user ?
Value:
GPU 0:	72.0C	2504RPM 	42% 	114	| 554.3/552.1Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:34667	R:190	HW:0	U:7.60/m 	I: 9
GPU 1:	66.0C	1052RPM 	0% 	66	| 554.8/552.1Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:34859	R:198	HW:0	U:7.65/m 	I: 9
GPU 2:	72.0C	1184RPM 	33% 	105	| 554.7/552.1Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:34519	R:196	HW:88	U:7.57/m 	I: 9
GPU 3:	67.0C	1042RPM 	0% 	67	| 554.0/551.6Mh/s | 	99% |	930Mhz 	800Mhz 	1.17V 	A:34762	R:171	HW:25	U:7.63/m 	I: 9
GPU 4:	72.0C	1092RPM 	10% 	82	| 554.6/552.0Mh/s | 	98% |	930Mhz 	800Mhz 	1.17V 	A:34737	R:172	HW:0	U:7.62/m 	I: 9

Are you running all 7970's? What drivers and setup are you using to get windows to recognise all 5 GPU's? Are you using XP/Vista/Windows 7? 32bit or 64bit?

I cant for the life of me get more than 4 gpus going at once.

ThiagoCMC

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Okay, it is impossible to undervolt those cards under Linux... Damn...

goxed

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Quote from: ThiagoCMC on August 14, 2012, 03:29:46 PM

I'll try this one under Ubuntu Linux 12.04 64 bits:

http://sourceforge.net/projects/amdovdrvctrl/

Is ADL able to undervolt in Linux? I think CGMINER uses ADL, and it doesn't work for me in Linux. What works for me is flashing a 7950 BIOS to a 7970 card. Reduces the voltage to 1.03V or so. I would be very interested in the undervolting results using amdovdrvctrl on Tahiti chips.

ThiagoCMC

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I'll try this one under Ubuntu Linux 12.04 64 bits:

http://sourceforge.net/projects/amdovdrvctrl/

ThiagoCMC

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Quote from: goxed on May 24, 2012, 08:30:04 PM

Can I undervolt a 7970 card in Linux?

AMDoverdrive ?!

It is on my queue to undervolt my 7970 under Ubuntu Linux 64 bits / Catalyst 12.6 / CGMiner 2.6.4...

If anyone already does that, please, share it!

Cheers!
Thiago

cmg5461

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Quote from: jjiimm_64 on May 24, 2012, 12:16:07 PM

Quote from: cmg5461 on May 24, 2012, 12:07:27 PM

Quote from: jjiimm_64 on May 24, 2012, 11:09:35 AM

my .2 bitcents... stop trying to put gpus into warp drive...

also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference

huge difference for an extra 750Mhash :p

so you going to pay 600 watts for 750 mhash? do you have free electric?

lets put this into perspective:

600 watts is ~ 47.50 $ at .11 p/kwh
750M at current diff is $66.16 per month

so to make all that extra heat, you pay 20 bucks a month! you loose money to over clock that much

You didn't see my sarcasm there :p

goxed

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Can I undervolt a 7970 card in Linux?

joshv06

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Yes I agree, I think it's best to push for best Mhash/W optimum profits, rather than just trying to get the most Mhash.

jjiimm_64

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Quote from: crazyates on May 24, 2012, 12:18:46 PM

Quote from: cmg5461 on May 24, 2012, 12:07:27 PM

Quote from: jjiimm_64 on May 24, 2012, 11:09:35 AM

my .2 bitcents... stop trying to put gpus into warp drive...

also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference

huge difference for an extra 750Mhash :p

As much as I like my OC and squeezing every last hash out of my cards, there is a case for downclocking. Adding an extra 600W for 750MH/s is quite inefficient...

that is an understatement.. it costs money
600 watts is ~ 47.50 $ at .11 p/kwh
750M at current diff is $66.16 per month

crazyates

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Quote from: cmg5461 on May 24, 2012, 12:07:27 PM

Quote from: jjiimm_64 on May 24, 2012, 11:09:35 AM

my .2 bitcents... stop trying to put gpus into warp drive...

also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference

huge difference for an extra 750Mhash :p

As much as I like my OC and squeezing every last hash out of my cards, there is a case for downclocking. Adding an extra 600W for 750MH/s is quite inefficient...

jjiimm_64

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Quote from: cmg5461 on May 24, 2012, 12:07:27 PM

Quote from: jjiimm_64 on May 24, 2012, 11:09:35 AM

my .2 bitcents... stop trying to put gpus into warp drive...

also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference

huge difference for an extra 750Mhash :p

so you going to pay 600 watts for 750 mhash? do you have free electric?

lets put this into perspective:

600 watts is ~ 47.50 $ at .11 p/kwh
750M at current diff is $66.16 per month

so to make all that extra heat, you pay 20 bucks a month! you loose money to over clock that much

cmg5461

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Activity: 369

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Quote from: jjiimm_64 on May 24, 2012, 11:09:35 AM

my .2 bitcents... stop trying to put gpus into warp drive...

also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference

huge difference for an extra 750Mhash :p

jjiimm_64

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Activity: 1876

Merit: 1000

my .2 bitcents... stop trying to put gpus into warp drive...

also, the topic is undervolting.. at stock volts and 1100 clock my rigs(5x7970) pulls 1440 watts at the wall. at 930/300/.937 it pulls 835 watts... huge difference

crazyates

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Quote from: ddd1 on May 15, 2012, 04:45:30 PM

Quote from: lightlord on May 14, 2012, 12:11:12 AM

at 1230, it crashes within 5 seconds
at 1225, it crashes within 45 seconds
at 1220, it crashes within 2 mins with strange artifacts
at 1215, Currently running haven't crashed yet (Updated Just crashed)
at 1210, Trying now (crashed 10 mins)
at 1205, (crashed 10 mins)
at 1200 (20mins)

Threw the clock to 1190, hopefully it will be stable 24/7 at this when I go to sleep.

So you are testing stability with mining?

Which drivers cause PC to just crash and not shut off?

I'm not using a 7970, but with Win7x64 and 12.4, if I OC too much, my screen flickers a few times and I get a warning that my graphics driver stopped responding. CGMiner is still open, but doesn't hash.

goxed

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Is there any software compiled for Linux that can allow me to under volt reference 7970 cards?

Topic: 7970 undervolting (Read 17520 times)