I was experiencing several instabilities with the 180 CPU External frequency. So I went back to the default of 100 and got a Pitstop rating of 962 which I considered a benchmark.
Then I made 2 simple changes and upped the pitstop score to 1504. The changes were a CPU external frequency of 166 and increasing the V core voltage from 1.65 to 1.675.
I'm now running a SETI packet in about 2 hours which is even faster than when I had a CPU external frequency of 188!
Amazing how Bruce dragged me into the future...lol!