Mining Rig Problems (HD6950)

edited December 2013 in Hardware support

Hello!

Bevor I start complaining and describing what my problem is, I would like to point out, that I tried it myself
1 week and with help of my friend google!

My problem is that my graphic cards are running to hot (83°C+) but only make 270 khash/s each with the
following hardware setup:
1x AMD Sempron 140
1x Asrock 970 Extreme4 Mainboard

1x 2GB DDR3 RAM
2x Sapphire Radeon HD6950 1GB (Shaders unlocked)
1x Sapphire Radeon HD6950 2GB (shaders locked, but working on it)

I’m running on XUbuntu with the following setup:
#!/bin/sh
export DISPLAY=:0
export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
cd /home/mephy/cgminer-2.11.4-x86_64-built
./cgminer --scrypt -I 18 --thread-concurrency 8192 --gpu-engine 900 --gpu-memclock 1000 --temp-target
80 --auto-fan -o xxxx -u xxxx -p xxxx

A few forum threads say that this card could be get to 450 khash/s+ and that would be nice to achieve!

I hope you can help me!

Many thanks
Mephy
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