Practical Example: Which Desktop to Buy?

We will first explain what the terms and abbreviations in the red boxes mean, and then proceed to deciding which device is best for Johnny's lifestyle.

Desktop №1 Desktop №2 Desktop №3
Display 23'', LCD, 16:10, 3840 x 2160 20.5'', LED, 16:9, 2560 x 1440 27'', Curved, 21:9, 1920 x 1200
CPU Intel i7, 4.3 GHz, 20 cores, 28 threads AMD Ryzen 9, 4.9 GHz, 16 cores, 32 threads Intel i9, 3.2 GHz, 24 cores, 32 threads
Cache 64KB L1, 28MB L2, 33MB L3 256KB L1, 4MB L2, 68MB L3 128KB L1, 20MB L2, 24MB L3
RAM 3200 MHz, 16GB, DDR4, 2Rx8 1700 MHz, 8GB, DDR3, 1Rx16 5600 MHz, 64GB, DDR5, 1Rx8
Storage 7000 RPM SATA 2TB HDD SAS 850GB SSD 6500 RPM SCSI 1TB HDD

First thing first: let's begin with the display.