Maybe you like to have a look → Which Video Card? - #30 by Wolfgang and see, that DeepPrime makes use of the GPU. – When setting PL to “CPU only” it simply doubled the time with exports
( CPU comparison → UserBenchmark: Intel Core i5-10400 vs i7-8700 ).
When your GPU is supported by PL, better choose “Auto”.
My PC is almost 4 years now. For a really low noise machine I chose components with low power consumption (CPU 65W / GPU 125W max) in relation to output & price + low noise case & fans.
→ PL4 computer specs compared to PL3? - #38 by Wolfgang
→ Getting the PCspec right - #3 by Wolfgang
Specs are always a compromise, but I’m neither professional and nor ‘on the run’. 
