Topic: Cant get HD5850's to overclock and set fan speed in ubuntu (Read 3207 times)

I am running the Sapphire Xtreme 1 gig HD5850's.  These are not reference cards, so I dont think I can adjust the voltages in the bios.  Will AMDovrdrvctrl allow me to adjust the voltages?

I have modified the BIOS on all 3 cards. The only thing I done to the bios was set it so I could run low clock speeds on ram, and allow higher upper GPU limits.  The cards are set to run stock clocks on boot, and I use my scripts to overclock them.

Try install older catalyst 10.4 for example.

Which Sapphire 5850's are you using?  I have a whole bunch of the xtreme's and can't get aticonfig to apply memory settings outside of the overdrive range.  The lowest I can get the memclocks to is 900 with aticonfig.

Did you flash your cards' bios?

On my Sapphire 5850's most will do at least 880,900 yielding 330-340 MH/s  Some will only take 850,900 and a few lousier ones will only take 820,900

In windows I can use trixx to get around 370 MH/s with 960,300 @1.25 volts.  I can't get over 900 gpu clock without upping the voltages.

I'm experimenting with the latest version of AMDOverdriveCtl to get the memclocks lowered in ubuntu.

Also, there's another thread about oc'ing the 5850's you might be interested in.

the line with adapter=all is just for safety. All it does is apply the aticonfig --od-enable to all 3 of the adapters.
The second line: DISPLAY=:0 aticonfig --od-setclocks=800,300 --adapter=${1}   applyes the clock settings to the variable ${1} which in this case would be GPU0 since I run the command like this:  startminer.sh 0

Im not very good with *NIX OSs but i give a try:
Why is there adapter=all if you only clock ${1}? And shouldnt there be --odcc (confirm clock)

I have a 600W PSU that is running the system plus GP0, and then I have a 425 ePower JuiceBox that is running the other 2 cards GPU1 and GPU2.

Total power draw from both PSU's is showing to be about 600w from my Kill-a-watt meter

What is strange is that I can overclock all three cards in Win7 to around 940 with no problems.

Which PSU do you use?

I have 3 Sapphire HD5850's running.  I have tried to overclock them but I am not getting very stable numbers. Each card is identical, and i cannot get them to clock to the same speeds. I can barely even overclock one of them

Heres my setup:
Ubuntu 11.04 64 bit running headless, GDM is set to not start on boot, and I have a script in /etc/init to start X
Catalyst 11.5
AMD SDK 2.4

On GPU 0 I can only get it to stay stable at 800 gpu 300 mem. If I go any higher, I get a system lock and have to reboot to free it.  This is the GPU that I used to install Ubuntu, but I am currently running it headless.  Also I cannot get the damn speed to set on boot using my start script. I will post the script below:



I dont understand why the fan speed will not set with this script, since I can run this same exact command: DISPLAY=:0 aticonfig --pplib-cmd "set fanspeed 0 75"  and it will set the fan with no problems from a normal terminal session.


GPU 1 will only overclock to around 900,300 and be stable. 
GPU 2 will only overclock to around 930,350 and be stable.


Here is the script I am using for these 2 GPU's:



These cards will run at low temps for hours on end. The highest temp Ive seen has been around 65c.

I  have seen alot of folks running this same setup and are able to get 950,325 out of their Sapphire HD5850's with no stability problems. What are some things I can try to get these cards stable and higher clock speeds?  Do I need to export any display settings?