The lone remaining desktop Dells with Nvidia graphics are in the high end XPS line and some All-In-One (AIW) models. The AIWs and laptops have a lot in common. They have longer design cycles, and Dell can't just swap out graphics parts when things go pear shaped with a particular supplier. What the systems were designed for years earlier is what they have to be shipped with, and what those models will stay with until they are replaced.