This DX9 game has the reputation of being one of the most demanding and stressful games on modern video cards. The Enhanced Edition offers a new zone, more quests, more cinematics, and several bug fixes. "The Witcher 2: Assassins of Kings just underwent a major update. Maybe in 1-2 years with a single GTX980 or GTX1080 (if they're gonna call it like this) may be able to max the Witcher 2 with ubersampling and maintain 60 fps in 1080p/1440p and eventually 4k. Also, ubersampling is disabled and cannot be enabled and the text is red instead of black. ubersampling is only recommended for SLI/Crossfire users. I can play the Witcher 2 at the Ultra Setting but it crashes when entering a cutscene. You can argue that a DX9 game lacks many of the optimizations of DX10 and 11 which help the performance of these cards but it would seem that as far as testing the raw graphics power of a card, Well, a 780 alone is not powerful enough for this game on maxed settings. When it was enabled saw frame rates reduced to 20fps or lower, something that the old standby Crysis just cannot do.
If I run it with stock settings I get steady 40-ish fps. EVGA GTX 780 Classified OCed to +145 Mhz Clock Offset, and +425 MHz Mem Clock offset, no voltage increase. It takes a big close-up to notice the difference between ubersampling off and on. I run it at steady 45-52ish fps with my rig with everything maxed out including ubersampling. I have read several other articles about it, but never see the difference at the screenshots. The most demanding feature of the game is UberSampling, which incorporates Antialiasing and Anisotropic Filtering and can bring even these powerful graphics cards to their knees. Hey article at The Witcher 2 Ubersampling Comparison is a very good one. The Radeon HD 7970 and GeForce GTX 680 both struggled equally at 2560×1600 on this game, which is quite impressive for a year old game. Ard|OCP overheard that The Witcher 2 underwent a large update, to the tune of 10GB or so, which gave them an opportunity to pit the newest GPUs from NVIDIA and AMD against a game which has a reputation for being hard on graphics card.