WDDM

The Windows Display Driver Model is the architecture used by modern graphics packages. It lets Windows schedule GPU work, manage graphics memory, recover from many application hangs, and share the processor across desktop and compute workloads. The Display tab in dxdiag reports the model version exposed by the installed package and operating system. New Windows graphics features may require both compatible hardware and a sufficiently recent WDDM version, so installing a current package can enable features the old one did not expose. It cannot make unsupported hardware conform to a newer model. If flicker or resets begin after an update, use the previous stable package and check Event Viewer rather than editing timeout values to conceal repeated failures.