In an official statement, the hardware manufacturer said both games benefit from Nvidia GameWorks, its middleware software suite that brings together rendering, visual effects and physics development modules.
"Both Batman: Arkham Knight and The Witcher 3: Wild Hunt raise the bar for graphics, rendering two very different open worlds with a level of detail that we could only dream of last decade," the company said.
"On the PC, each game is also bolstered by Nvidia GameWorks -- increasing fidelity, realism and immersion."
The Witcher 3's release date was recently delayed by three months but is now expected to ship on May 19.
Meanwhile, the Batman: Arkham Knight release date is set for June 23. Publisher Warner Bros. recently responded to criticism over the pricing of its $40 (£32.99) season pass by detailing some of the content that will be offered to purchasers, such as a prequel campaign featuring Batgirl, character skins and additional story missions.