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Title: [GUIDE] How to underclock mem in Ubuntu Post by: Okama on June 03, 2011, 07:14:35 AM Hi all,
I'm not sure if this has been posted before or not. I searched but didn't find something clear enough, so I decide to create one :) There are 2 ways (as I know) to modify the GPU clock/mem under Linux. 1. Use a tool to override AMD driver 2. Modify the VGA bios I will go with the no.1 first. 1. sudo apt-get install git libwxgtk2.8-dev 2. git clone git://amdovdrvctrl.git.sourceforge.net/gitroot/amdovdrvctrl/amdovdrvctrl 3. cd amdovdrvctrl 4. wget http://download2-developer.amd.com/amd/GPU/zip/ADL_SDK_3.0.zip 5. unzip ADL_SDK_3.0.zip -d ADL_SDK 6. make 7. sudo make install 8. AMDOverdriveCtrl << start the program You can chage the memory clock in Overdrive tab http://1.bp.blogspot.com/-mdAOf7aWo34/TV0kMlaVd2I/AAAAAAAABCU/jDmJOnllA-s/s320/ati_4.png (The image above is from here (http://www.ubunturoot.com/2011/02/amdoverdrivectrl-tweak-tool-for-ati.html)) By the way, using AMDOverdriveCtrl is a little inconvenient in case you have more than 2 cards. And I decide to re-flash the VGA bios with new clock settings. I use Radeon BIOS editor (http://www.techpowerup.com/rbe/), GPU-Z (http://www.techpowerup.com/gpuz/) & ATI WinFlash (http://www.techpowerup.com/downloads/1919/mirrors.php) Note: This is Windows tools >:(. 1. Save the current BIOS with GPU-Z (You can see the Save button in the same line with BIOS Version) http://tpucdn.com/gpuz/screen1.gif 2. In RBE, open your saved file 3. Change the clock settings http://tpucdn.com/rbe/RBE_Clocks_small.png 4. Save the custom BIOS, flash with ATI Winflash and there you go. Tips: Tried to find the stable settings for my VGA first (core/mem) and then set them to default clock in BIOS. Don't need to do anything more in Linux :) Using the above methods, my 5870 gives me ~430Mhash/s with 1000/300 mem/core (voltage remains) and save some few Watts ;D. http://img41.imageshack.us/img41/7438/screenshot20110603at352.png (http://imageshack.us/photo/my-images/41/screenshot20110603at352.png/) Refs: Tutorial on how to use RBE (Radeon BIOS Editor) (http://www.techpowerup.com/articles/overclocking/vidcard/154) Feel free to give away something if you like my post 1AAf3a8RT8anVvomhMNovZqcZvzMpu4SAA Title: Re: [GUIDE] How to underclock mem in Ubuntu Post by: Prze_koles on June 04, 2011, 10:57:19 PM I can't use AMDOverdriveCtrl, says Segmentation Fault :(
Title: Re: [GUIDE] How to underclock mem in Ubuntu Post by: CubedRoot on June 04, 2011, 11:04:59 PM What about adjusting voltages on ATI cards in Linux?
Title: Re: [GUIDE] How to underclock mem in Ubuntu Post by: mikegogulski on June 05, 2011, 12:31:24 AM $ aticonfig --adapter=all --od-enable
$ aticonfig --adapter=all --odsc=###,%%% (where ###=core clock and %%%=memory clock) |
