Posted this info in another thread but reposting in it's own thread so that it does not get lost.
It seems alot of people have questions about 7970 including things like max temp / voltage and especially regarding some of the apparent voltage regulation irregularities with this cards.
The following is a list of things I have discovered so far both by conferring with other forum users and through personal research. please feel free to add to or discuss this list or to post question that you would like answered as I want to get as much good info in one place about this card as I can so people have an easy one stop reference guide for the 7970.
1. Stock voltage for some cards is 1.05 volts while for most it is 1.17 volts however Afterburner/GPUTweak/Trixx will put all cards at a default 1.17 volts.
2. Cards with a default voltage of 1.17 can hit the limits of the CCC slider whereas ones with a default VID of 1.05 can not.
3. Cards with a stock VID of 1.05 which get auto bumped to 1.17 by oc software usually gain significant OC headroom at the new voltage putting them on par with the 1.17 VID cards.
4. Afterburner is the only software which actually reports current voltage for the 7970.
5. 7970's seem to have some sort of vdroop voltage mechanism for example a 7970 set to 1.1 volts on afterburner will only actually draw 1.07-1.08 volts at load.
6. Afterburner (but not other OC software) will sometimes report extremely shot extremely large voltage spikes which range anywhere from 1.3 volts to 1.5 volts this appears to be a software issue and not a case of the voltage actually getting that high.
7. Max safe Temp appears to be 95C
8. Anytime a 7970 exceeds 95c it will immediately move the fan up to 100% till it gets temps back under control.
9. Max safe voltage appears to be 1.3 volts (assuming you can keep it cool) no guarantees on this one could be higher or lower but it's looking like that's what it is.
It seems alot of people have questions about 7970 including things like max temp / voltage and especially regarding some of the apparent voltage regulation irregularities with this cards.
The following is a list of things I have discovered so far both by conferring with other forum users and through personal research. please feel free to add to or discuss this list or to post question that you would like answered as I want to get as much good info in one place about this card as I can so people have an easy one stop reference guide for the 7970.
1. Stock voltage for some cards is 1.05 volts while for most it is 1.17 volts however Afterburner/GPUTweak/Trixx will put all cards at a default 1.17 volts.
2. Cards with a default voltage of 1.17 can hit the limits of the CCC slider whereas ones with a default VID of 1.05 can not.
3. Cards with a stock VID of 1.05 which get auto bumped to 1.17 by oc software usually gain significant OC headroom at the new voltage putting them on par with the 1.17 VID cards.
4. Afterburner is the only software which actually reports current voltage for the 7970.
5. 7970's seem to have some sort of vdroop voltage mechanism for example a 7970 set to 1.1 volts on afterburner will only actually draw 1.07-1.08 volts at load.
6. Afterburner (but not other OC software) will sometimes report extremely shot extremely large voltage spikes which range anywhere from 1.3 volts to 1.5 volts this appears to be a software issue and not a case of the voltage actually getting that high.
7. Max safe Temp appears to be 95C
8. Anytime a 7970 exceeds 95c it will immediately move the fan up to 100% till it gets temps back under control.
9. Max safe voltage appears to be 1.3 volts (assuming you can keep it cool) no guarantees on this one could be higher or lower but it's looking like that's what it is.