Nothing major introduced to the data:
-prices updated to today
-benchmark results are the same as previous spreadsheet from cited review
-added $.21 kWh rates as well as 2 year and 4 year frequencies for upgrading (total of 4 sheets)
-all spreadsheets sorted by FPS/total costs
I noticed while updating prices that most nVidia cards stayed the same and a lot of AMD cards dropped. Particularly noting the 6850 and 6870, which now are attaining leading positions.
In short, here are the recommended efficient setups per upgrade frequency/kWh for gamers that prefer higher frame rates (60+) and settings. (If you can live with lower frame rates or settings, there are more efficient builds shown on the spreadsheets.)
--For 2 years use and with $.07 kWh energy charges the HD6870 CF @74.8FPS takes the lead and second place goes to GTX460 1GB SLI @61.9FPS.
--For 4 years use and with $.07 kWh energy charges the HD6870 CF or GTX460 1GB SLI again, but an HD6950 2GB CF @89.1FPS isn't far behind the GTX460 SLI in terms of efficiency and has a
lot more power.
--For 2 years use and with $.21 kWh energy charges the same as above except the HD6950 2GB CF starts to really catch up.
--For 4 years use and with $.21 kWh energy charges the leads start to really pull away from the majority of how other setups are. Again, being those listed above, except we're starting to see single GPUs become more efficient. Namely the HD6950 2GB @50FPS and HD6970 @55.7FPS. The HD5870 CF @75.2FPS starts to reach the top as well just barely above the GTX460 1GB SLI.
https://spreadsheets.google.com/ccc?key=0Aom9AHEzDd75dE9ValFJcWw2RW1PM0s4TlVxcE5Uanc&hl=en#gid=0
More updates to come in the future! As always, comments and suggestions are welcome. Anything I can do to make it less cluttered, easier to read, or more informative I'm happy to oblige.