Looking at this again on my desktop PC (rather than my laptop), I think the bottleneck is the software. Registax only seems to use one or two cores of the CPU and then the utilisation of these appears to be about 50%, whereas if I use Autostakkert it uses all cores and utilisation for each goes up to near 100%. This is despite altering Registax to use “8 CPUs” in its settings (this PC has 12 cores). I just need to now teach myself how to properly use Autostakkert and just use Registax for wavelets though their Wavesharp software seems much better at this.
James