The Z420 Workstation is on the low end of HP's full-sized Z-class, with only the even newer Z220 and the all-in-one Z1 below it. That said, it still gives you all the functionality of a full-sized ...

Inside you'll find that the motherboard, processor, and power supply are not removable, but that everything else in the machine is – by hand. For a look at that whole process on the Z420, head ...