Sorry for double post ... i forgot to restart my mining rig after downgrading to cat 11.5 again ...
now the cpu load is back to 1% using 3 gpus .. but im still using app sdk 2.5 which brings no more performance ^^ so you can stick to 2.4 ... but 11.5 runs without problems ... 11.7 runs with 100% cpu usage ^^
hope that helps ... the tutorial posted one post before is really great ...

i used this tut a while ago:

https://bitcointalk.org/index.php?topic=9239.0

my cpu load wa around 1% ... now i did update the driver from 11.5 to 11.7 and the app sdk from 2.4 to 2.5 and my cpu load of 100% is back .. now my multi gpu system has problems to hold the 330MH/s on all cards because the cpu seems to be too weak ... a fallback didnt fix it ... running 11.5 and app sdk 2.4 again didnt fix the problem ... im guess i have to try if a complete reinstall would fix that problem again ...
but it is surely a driver problem and removing 2 cards from the system is giving me a cpu usage of 1% on one card. maybe a multi gpu opencl bug in the amd/ati driver ...

greets

philad

no ... i am not using my cpu for mining for sure ...
i tried ubuntu linux one more time ... this time i didnt use catalyst 11.6 ... now i used 11.5 ... cpu is now in idle ... but now i have the problem that my 5850's dont run at full speed ... they use a slower 3d mode with 550MHz instead of my set 875MHz ... aticonfig also show me that 875mhz is a valid peak clock. How can i force them to go at full speed?

i checked that ... i am using cypress 0-0 ; 0-1 ; 0-2
cpu is not in use

it already has high cpu usage when i just use one gpu ... i dunno why ... when i tested mining on my usual computer with 2x 5850 i had around 1% cpu usage max.

Hi,

i got a problem. My CPU usage climbs up to 100% when i am starting Mining. That leads to a lower GPU Clock which leads to a lower Hash Rate. The Hashrate ist getting lower when i start the workers of all three ATI Cards. I have the same issue on linux and windows. Usually i have 330MH/s on every card ... now it is 600MH/s for three of them ... thats for too low.

Config:

3x ATI Radeon 5850
AMD Sempron 140 @ AMD Athlon X2 4400e

AMD Catalyst 11.6
AMD APP SDK 2.4

Tried on Windows 7 and Linux. Both times with phoenix 1.48 and i tried phatk and poclbm with usual settings.
The CPU Rate should be at around 1% ... i also tried different affinitys ... all mining processes on CPU1 for example ... or CPU0 or on both and on different ... How can i fix that? I didn't have that problem when i tried it on my desktop ... very weird ...


greets
PhilAd

Hi,

i have been using the tutorial for a headless linux btc mining machine. thanks for that to dukejer :-)
i am using 3x ati radeon 5850 and my problem ist that they only run at 550MHz GPU
when i stop all off them and start only gpu0 i got 750mhz. When i start gpu1 the frequency on gpu0 changes to 550 and the gpu1 is 550mhz. this continous with gpu2. after a while all gpu's are at 550mhz. i only get 220MHash/s on each gpu and usually they are supposed to be at 330MHash/s.
aticonfig --odgc shows me this atm.


Default Adapter - ATI Radeon HD 5800 Series
                            Core (MHz)    Memory (MHz)
           Current Clocks :    550           900
             Current Peak :    775           900
  Configurable Peak Range : [550-775]     [900-1125]
                 GPU load :    100%

this is the same on all gpu's
the peak is atm at 775 but he is not using it. i am also using the usual AOD peak range.

I am using this settings:
 phatk VECTORS BFI_INT FASTLOOP=false AGGRESSION=13 WORKSIZE=128

greets

PhilAd