so is directx 12 ultimate only for next gen gpu's?

so is directx 12 ultimate only for next gen gpu's?, Page 2

MSI RX 550 4GT LP OC Computer Graphics Cards : Electronics

DirectX 12 Ultimate is here to level up the graphics on your Windows PC and Xbox Series X

NVIDIA Posts First DirectX 12 Ultimate Driver Set, Enables GPU Hardware Scheduling

Microsoft Unveils DirectX 12 Ultimate, Its Next-Ge - AMD Community

What is DirectX 12 Ultimate and what does it mean for PC gamers?

DirectX 11 and DirectX 12: Which One is Better?

What You Can Expect From the Next Generation of Gaming - Xbox Wire

How is DirectX 12 Different From 11?