No need to make apology. Your feedback has been quite helpful. I can put off acquiring multiple cores until I actually find some use for them. Interestingly enough, FreeCAD - something I've been looking at as a Sketchup replacement - is also single-threaded.
edit: Your insights regarding Sketchup slowdowns due to instability seem to have hit paydirt. Here's the situation:
I have two models I completed recently, one of which has a bunch of cylinders - several thousand, in fact - while the other has a bunch of cylindrical cavities. Both file sizes are identical, and both caused major slowdown in Sketchup during any kind of move or resize operation. It took hours to resize both models at 3.7 ghz (the NB was also heavily overclocked, and the RAM timings were very tight). Resource monitor showed 100% CPU utilization throughout the entire operation with practically no disk activity or memory hard faults (and RAM usage of 52% or lower - typically around 30-37%).
I recently noticed instability doing other things (running Fallout 3, incidentally), so I redid the entire overclock without any voltage tweaks. Prime95/LinX/MemTest86+ got me to 3471 mhz @ stock voltage. Fallout 3 was having fewer problems, but it still locked up a bit, so I backed it off to around 3423 mhz with commensurate decreases in NB and RAM speed (just lowered the HTT). All seemed well.
So, I decided to repeat a resize operation I had done previously @ 3.7 ghz to see how long it would take. Resizing the second model took less than an hour - probably 45-50 minutes. I attempted another resize to repeat the results, and it crashed. Ooops! Not so stable after all.
Next I reset the system to stock settings across the board and attempted to resize the first model. Blowing the model up to 10x its normal size took LESS THAN A MINUTE. Shrinking it to .1x its size (returning it to normal) also took less than a minute. So, I went to the second model, and well, it's still going after about an hour, so I have to assume that a). my chip is no longer 100% stable at stock or b). resize operations are going to choke on this model more than on the first one.
I may have to start using Sketchup for stability testing!
Edited by drmrlordx - 4/7/14 at 9:20am