ive heard that you can underclock memory below chip speed on 7970,
but i cant find any stable points can anyone list stable oc and uc settings for stock cooling?
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I'm undeclocking memory at 350 with MSI Afterburner prior to starting my mining. You cannot do it with cgminer.
You must modify the Afterburner config file for this to work. Can't remember the details. Check in the Google machine.
Actually you can underclock with cgminer - e.g.
cgminer -o
http://pool:port -u username -p password -I 9 --auto-fan --auto-gpu --gpu-engine 750-950
--gpu-memclock 300see this thread:
https://bitcointalk.org/index.php?topic=68793.0[EDIT]
I find it crashes less if you don't use afterburner (or other radeon ati overclocking apps) - just overclock for bitcoin with cgminer params