Ha, when was the last time you read in this forum the argument "get the 970 less on the power bill" or when 290X was coming out "290X will destroy your electricity bill, get a 780Ti or a Titan Black"
And when myself or others proved that the argument of "power efficiency" and "electricity cost savings" is a ridiculous argument, they just carry on the same motto?
And we did prove in here (i can find my posts when electricity was 30% more expensive also than it is now) that you have to run the 780Ti & Titan Black for 25-40 years MORE than the 290X to justify the extra costs, at 10h per day 365d per year running all that time at 100% load. While most of them had no clue how much they pay for their electricity bill on Kw/h?
Even in here over this page, you see someone mentions the power efficiency of the Nvidia cards. Which is completely bonkers.