I've been going on about improved energy efficiency and low power consumption for a while now, and here are finally the measured power consumptions with each card.
The most interesting this time is obviously the comparison between the Pitcairns and the HD 6970 and in this comparison the HD 7870 consumes 64 watts less at full load
and the HD 7850 copes with a full hundred watts less. Also the idle power consumption has lowered by 10 watts.
The HD 6870 and HD 6850 consume just about the same amount of power as their follow-up models, but seeing how badly they got ran over in the benchmarks this is also
good news for the Pitcairns' performance per watt-value.
Editor's Choice Award!
HD 7870 GHz Edition
In the recent years AMD's mid-range gaming cards have been offering very good value for money and performance per watt, and the Pitcairns sure keep up the
reputation. The cards perform very similarly with the last generation HD 6970, while consuming 60 watts less power. One thing we've also noticed with the HD 5770, HD
6850 and HD 6870 is that they've all been decent overclockers, and the newcomers didn't let us down on this area, either. Both GPUs overclocked by 15% without any
problems, which made the performance numbers even more impressive.
That's the HD 78-series, but what about HIS's versions of the cards? These models come from HIS's basic "Fan"-series of cards, so they run at reference clock speeds
and don't feature HIS's excellent IceQ-coolers. That said, they are rock solid cards and can be recommended without any reservations.