The Xbox 360 and PC versions of id's RAGE sport higher framerates than the PlayStation 3 version, the latest issue of Edge magazine reveals.
In a ten-page reveal in its latest issue, Edge writes that the Xbox 360 version of Rage - which uses id's new Tech 5 engine - matches the 60fps framerate of the PC version, while PS3 runs at just "20-30fps".
Update: id Software has responded in the aftermath of the Edge article, saying: "The Edge Magazine article has caused quite a ruckus. We are committed to ensuring that gamers on all platforms have a great RAGE experience," on its official Twitter feed. Update Ends.
It's not mentioned whether the PS3 framerate will be addressed by the game's eventual release.
"The PS3 lags a little bit behind in terms of getting the performance out of it," John Carmack told Edge. "The rasteriser is just a little bit slower - no two ways about that.
"The RSX is slower than what we have in the 360. The CPU is about the same, but the 360 makes it easier to split things off, and that's what a lot of the work has been, splitting it all into jobs on the PS3," he said.
Watch tons of other game videos in HD over on our video channel!
The PS3 edition was thought to be the most technically capable of the console pair, thanks to id being able to squeeze the gigantic shooter onto a single-player Blu-ray disc, compared to Xbox 360's four DVDs.
Update: Edge has posted further details from its article saying that Carmack is confident that the PS3 version will match that of all other supported platforms: "Everything is designed as a 60 hertz game. We expect this to be 60 hertz on every supported platform.
"The work remaining is getting it locked so there's never a dropped frame or a tear, but we're confident that we're going to get that."