Thanks much, Cactus. I'll fuss with things again this evening and follow up on the X1 forum if necessary. Sorry, I don't come by here often. Only when I have a problem.
My old computer was a cheapie, totally generic, and ran big projects just fine. I had frankly expected to have to tweak that one or get another drive, but it lit right up.
The one I just got is 6 years newer so I'd really thought it would have no issue doing audio. CPU usage seems to ride nice and low. I'd assume I'd have the disk bandwidth--I'll look at the Resource Monitor tonight.
Again, the initial project is straight audio, a little SONAR reverb on an effects bus, but that's it.
CAF