Skyrim: Special Edition performs worse on PS4 Pro than on a standard PS4, according to a new report by Digital Foundry.

According to the report, while the Pro version manages to hit its 30fps target "by and large", it can occasionally drop 2-3fps lower than the standard PS4 version due to its native 4K resolution.

"Sony emphasizes that games running on PS4 Pro must have frame-rates that are better than or equal to the game running on the standard PS4 console," the report says. "However, that's not the case with Skyrim, where the increase in resolution can lead to a visible drop in performance in scenes where the GPU is pushed more heavily.

"For example, scenes that feature use of alpha-heavy effects cause frame-rates to deviate from the desired 30fps target. In like-for-like situations, the PS4 Pro game sees a 2-3fps deficit, resulting in more noticeable stutter compared to the title running on the standard PS4 console. The base PS4 performance isn't impacted to the same degree, with only a few 1-3fps drops cropping up on occasion across a general run of play."