Quote from: pox67 on April 16, 2013, 09:32:24 AM

Quote from: drewz on April 16, 2013, 06:17:09 AM

Start 1 #1: I run the miner on the first to GPU, good hashrates ±560, when i start mining the 3rd GPU-system crash/shut down
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I also watch the GPU temperatures, it reached 90c on some settings - on other settings the GPU temperature was quite ok (maxing 81 for one GPU the others at about 60) but the GPU was reaching 99% constantly (on other settings the was to change in load).

Couple of ideas:
1. not enough power to the system, once you start the 3rd card the system will crash out, I would have thought 850w should be enough though.

2. getting too hot - run with case open and a big fan pointing straight at system.

3. one card is faulty - try mining with each card for an hour by itself.

For 1 and 2 undervolting may help. You should be able to drop the volts (VDDC in afterburner) to 1.030 at stock clocks.

I thought about this stuff also..gonna try some changes ..strage thing is that the last setting i used with afterburner worked and the sistem was getting 1500 ..but the pool was registering only 500 than i stop stated it again and crashed. Also i started all the miners with a gab better util each one got stable