Bitcoin Forum
September 26, 2018, 10:13:54 AM *
News: ♦♦ New info! Bitcoin Core users absolutely must upgrade to previously-announced 0.16.3 [Torrent]. All Bitcoin users should temporarily trust confirmations slightly less. More info.
 
   Home   Help Search Donate Login Register  
Pages: [1]
  Print  
Author Topic: How to undervolt 7950 vapor-x OC on linux  (Read 4775 times)
jhk753
Newbie
*
Offline Offline

Activity: 52
Merit: 0


View Profile
June 04, 2013, 08:06:40 PM
 #1

Hi everyone,

I just finished to configure a 3x 7950 sapphire vapor-x OC edition.
It runs very well at 1920kh/s on xubuntu and it takes 800watt from the wall.

But I want to improve the energy efficiency.

First I have auto-fan with a target temp at 75C on CGminer.
Second, I try to undervolt with CGminer, but the command doesn't change the voltage.

Current config : Engine: 1080 Mem: 1500 volt: 1.15

I read a few things on how to undervolt vapor-x on windows, but does someone know how to do it on xubuntu ?

Thanks a lot.
Make a difference with your Ether.
Donate Ether for the greater good.
SPRING.WETRUST.IO
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
SkyNet
Member
**
Offline Offline

Activity: 78
Merit: 10



View Profile
June 04, 2013, 09:13:30 PM
 #2

Well if you cannot do it with the cgminer switches (--gpu-vddc) most probably you are out of luck. Also try another driver version.
If both don't work Windows is the way to go. Afterburner and Trixx will do it.
I don't think that you can undervolt a lot though with your current config (most probably 1.10)

Tips: 1JmQ78JprWePM3EapnacPFfAtTrob8ofmU
jhk753
Newbie
*
Offline Offline

Activity: 52
Merit: 0


View Profile
June 04, 2013, 09:29:25 PM
 #3

Ok thanks
philips
Hero Member
*****
Offline Offline

Activity: 700
Merit: 500



View Profile
June 04, 2013, 10:16:12 PM
 #4

BIOS flash.
micitzu
Newbie
*
Offline Offline

Activity: 11
Merit: 0


View Profile
June 08, 2013, 07:15:48 AM
 #5

Hi,

Bios flash? I am using Sapphire VaporX 11196-09-40G and there is only 1 available bios for this GPU V49_V4A.

Have you a modified version of the bios? I how that for the Gigabyte there is the F43 that is working very good.

Have you installed the Gigabyte bios on the Sapphire card?

At the moment I haven't been able to modifie the voltage on this cards (Trixx, Afterburner in win and amdOveridervoltage in xubuntu/ubuntu).  If I go on a high level configuration it goes to 1.250V, even if from the various topics it uses only 1.115 or 1.150...

I am not energy efficient at the moment...

Looking forword to your imput

I have tried:

win 7 - 64 biti:
- driver 12.8 / 13.1 / 13.4 (and all the available betas from 12.8 up)
- SDK form 2.4 up

xubuntu/ubuntu: 12.10 and 13.4 systems
the same drivers...

philips
Hero Member
*****
Offline Offline

Activity: 700
Merit: 500



View Profile
June 08, 2013, 10:48:34 AM
 #6

https://bitcointalk.org/index.php?topic=216474.msg2272704#msg2272704
Pages: [1]
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!