Windows Central checked out the GMK NucBox2
A quote from the article:
Small and mighty.GMK NucBox2 Review
GMK rose through the pandemic with its launch of the NucBox Mini PC. It's surprisingly capable for such a compact size, but there's only so much the quad-core Intel Celeron can handle, which is where the GMK NucBox2 comes into play.
Like the NucBox, this mini PC is compact and will easily mount to the rear of your monitor for a clean workstation, but that's about where the similarities end as this is a whole different beast. Instead of a mere Celeron CPU, GMK opted for a laptop-grade Intel Core i5-8259U, which not only has hyperthreading for eight cores but can also boost to 3.80GHz.