Update: Well, the 2nd-oldest card I have, a Xotac GTX 970, has frozen fans. These are low profile fans so nothing I have laying around will fit, but I'm sure Amazon has something that will fit. In the meantime, I relocated the GTX 1070 into the MacPro and fired it up, increasing the daily production numbers to somewhere between 750K - 850K PPD.
I have to admit that reaching the milestone of One Billion Points is something I didn't think would happen so soon. I know it's been eleven years since the SatelliteGuys joined the ranks of the worldwide Folding at Home Project, but in that time competing projects and even Cryptocurrency has become a huge draw on the electrical grid of our country and around the world. Cryptocurrency mining is reported to use more electricity world-wide than the country of Poland. Of course, it's too late to switch GPUs over to Cryptocurrency mining as the only way to break-even is if you have renewable ("free") power or have ASIC Mining rigs.
So I guess my nod toward Earth Day is to shut down and retire the Dell T7400 workstation. It will take a month or so to see how much of a difference it makes on the electric bill. Plus, the weather is warming up (dare I say "Spring"?) and the less heat in the basement yields lower cooling costs in the Summer.
Is it worth my while to put the GTX 960 & GTX 970 up in the Classifieds?