The Desktop Tower (DT) version of these Dell Optiplex computers is the Goldilocks version of the many options that Dell offers in my opinion. About the same desktop footprint as the Small Form Factor (SFF) version, but a little taller. The SFF units are really cramped inside, and not well ventilated, so adding a graphics card causes insane temperatures and noise from the blower style cooler on the cpu (and gpu). In comparison, the DT versions have much better layout and a normal cpu cooler that is really quiet, and has MUCH better ventilation for the inside of the case.Like the SFF version, a half height graphics card is required. I used a Nvidia RTX A2000 6gb graphics card (pro equivalent to a 3050), and it plays anything at 1080p at fluid refresh rates. MUCH higher performance than the GTX 1650 that most people go with. If you need more than the A2000, the Mini Tower (MT) version uses a standard ATX power supply, and replacing it gives you much more in the way of options for graphics cards. Hope this helps someone figure out which is the best option in these older Dell computers.