Nvidia has just released a new Game Ready driver, headlined as delivering support for a few new games. Specifically, there's Portal: Prelude RTX, which has RTX IO support (a variant of DirectStorage that we're told works on non-Nvidia GPUs as well), and Ratchet & Clank: Rift Apart, which also has RTX IO suport. Alongside the games, this is also the first driver with support for the GeForce RTX 4060 Ti 16GB custom cards from AIBs. However, you have to dig through the release notes (PDF) to find out that this is the long-awaited driver release which finally addresses DPC latency.
Last month we reported that Nvidia's software quality assurance spokesperson Manuel Guzman signaled a DPC latency fix had been developed and that it was just going through QA before it could be rolled out. Deferred Procedure Calls (DPC) in Windows were designed for high-priority tasks to defer required but lower-priority tasks for later execution. If a driver's DPC routines aren't written correctly, the user can see symptoms manifest as stutters, skips, and similar glitches in video and audio. Users who aren't sure if they are affected can run the Latencymon tool, to check their numbers; smaller values are better.
