Running 3 5870's, 2 on 16x risers and 1 on 4x to 16x riser. PC will just freeze after random amounts of time mining, then i have 2 reset.
It can run a couple of hours no problem, sometimes couple of days. If I remove the card on the 4x to 16x riser and just run the 2 on the 16x risers, same story.
If i remove the risers and run the 2 straight on the m/board no problems. Ruled out power problems. So it must be the risers. But why? Could it be EMI from the risers?
Just want everything to run smoothly in 1 rig.
It is possible the risers could be slightly defective.
It is possible the risers are blocking some fo the airflow and the cards are running just enough hotter to cause issues.
It is possible the mobo is having issues pushing the juice pulled from board up the risers. (try some with power molex to test)
It is possible that baby jesus hates your tree killing endeavour and is stopping it. ;p
What OS ver and kernel (32 or 64 bit)?
What ver Catalyst drivers?
What miner ver and kernel ver??
Have you inspected the riser cables closely for any loose connections or shorted connections from poor soder?