If I were to guess the reason for the difference, I'd notice:
- Your Dell has a SATA SSD, the Mac Pro has an NVMe SSD
- Your Dell has no wifi/bluetooth, the Mac Pro has WiFi 5 and Bluetooth 5.0
- Your Dell has 1 gigabit Ethernet, the Mac Pro has 2x10 gigabit Ethernet
- Your Dell has no Thunderbolt 3 ports, the Mac Pro has 8
- Your Dell doesn't come with a keyboard and mouse, the Mac Pro does
- Your Dell doesn't have any equivalent for Apple's T2 chip or Afterburner card
Although the Gizmodo one doesn't have a lot of these, either. Most of the price difference seems to have to do with yours being a Precision 5820 and Gizmodo's being a Precision 7920. I'm not sure exactly what the difference is here, but it might have something to do with expandability?
If you're not concerned with expandability, the iMac Pro seems to have better specs for a lower price, and may be a fairer comparison.
The 'Afterburner card' isn't present in the base configuration of Mac Pro we know the price for.
Dell can add an NVMe SSD, wifi, bluetooth, 2x10 gigabit ethernet, and a keyboard and mouse. Those increase the price by $400. Dell will do two thunderbolt ports for $70, so 8 would be $280.
So unfortunately the things you've listed only explain $680 of the price difference.
Yeah, like I said, a lot of the difference seems to be that yours is a Precision 5820 and Gizmodo's is a Precision 7920. Understanding the reason for the price difference there is probably pretty relevant to this.
https://www.gizmodo.com.au/2019/06/is-the-new-mac-pro-hands-...
If I were to guess the reason for the difference, I'd notice:
- Your Dell has a SATA SSD, the Mac Pro has an NVMe SSD
- Your Dell has no wifi/bluetooth, the Mac Pro has WiFi 5 and Bluetooth 5.0
- Your Dell has 1 gigabit Ethernet, the Mac Pro has 2x10 gigabit Ethernet
- Your Dell has no Thunderbolt 3 ports, the Mac Pro has 8
- Your Dell doesn't come with a keyboard and mouse, the Mac Pro does
- Your Dell doesn't have any equivalent for Apple's T2 chip or Afterburner card
Although the Gizmodo one doesn't have a lot of these, either. Most of the price difference seems to have to do with yours being a Precision 5820 and Gizmodo's being a Precision 7920. I'm not sure exactly what the difference is here, but it might have something to do with expandability?
If you're not concerned with expandability, the iMac Pro seems to have better specs for a lower price, and may be a fairer comparison.