Before we get inside, let's take a minute to address the difference in size between the Z820 and the Mac Pro.

Scale included for scale.

Hulking in at 17.5" x 8" x 20.7" and 55.4 pounds, the Z820 dwarfs our scale and makes photographing it a challenge.

On the lesser hand, the diminutive Mac Pro is 9.9" tall, 6.6" across, and 16.4 pounds by our bathroom scale.

We'll say it before the comments roll in, it looks like our scale isn't completely accurate at low weights, as Apple specs out the Mac Pro at 11 lbs. Not certified by department of weights and measures.