At the risk of hijacking this excellent topic (and not wanting to), I think there may be a good reason now to fit a discrete graphics card, in the form of SpectraLayers 10 (from version 10.0.10 onwards) which adds GPU acceleration to the unmix processes, and which supports GPUs not only from Nvidia, but also AMD, Intel and more.
Thankfully, @Nico5 , you’ve already made allowance for this!