After attempting a slightly longer R15 run on the model, the performance stayed about the same. It runs at approximately 72 model years per day. I was hoping for more, but that's quite respectable.
Currently, I'm running my first T42 simulation. I was guessing I would get 7 years per day for this run. I was using a fairly linear CPU comparison with Gondwana, my older cluster, which uses 16 2 ghz Opteron processors, comes in just under 10 years per day.
Well, initial performance results say that my calculations were way too low. The model produces a month of data every 7-8 minutes so far… that translates to a year-per-day range of 15-17. This result was far better than I anticipated!
We'll see if these results hold…