Try to stick with i5/i7 gen 6 or better ideally 4 cores or better. 8gb min ram and ssd only needs to be 128/256 if you going run nothing but Roon.
If you really want to remove any issues you can go for the i5 or better i7 NUC option and run ROCK.
i7 if you have a larger library or want to use DSP options like upsampling or convolution etc.
You might like to try Rock on something too…it’s free to try and many have had success getting it going on other than NUC hardware
See MOCK - Tell us what strange gear you've installed ROCK on!