Hello, there are a few differences : The 7820 has less internal space for internal storage , with 4 x 3.5" externally accessible bays. While the 7920 has 4 stock, but can add 4 more optional bays.The 7920 has a beefier psu, a few more pci-e slots and the ability to run more power hungry cards concurrently ( NOT 2x 3090 , anyway ).The 7920 can use way more ram, and can use optane memoryThe 7820 adds the 2nd cpu using a 2nd cpu carrier , is a bit more compact and lighter as overall weight.
Hello, I'm looking to upgrade my T7910 to one able to run Windows 11 and two sockets.  I'm wondering what is the difference between the Dell T7820 and T7920? Thank you in advance for your help, Bert.
Difference between a T7820 and T7920