Project CARS devs slap down accusations of favouring Nvidia owners | PCGamesN

Project CARS devs slap down accusations of favouring Nvidia owners

Project CARS release date

Reddit has been slinging some pretty serious accusations at Project CARS developer Slightly Mad Studios recently. A massive post suggests that the PhysX work in the game favours Nvidia cards, and PCs equipped with AMD graphics cards suffer massively. There’s even suggestions that this is a deliberate move because of the studio’s relationship with Nvidia. 

Slightly Mad Studios have retaliated today with a press release that denies all the allegations. 

“For the past few days, erroneous information posted on Reddit and other websites has spread misinformation with regards to Project CARS’ performance on systems using AMD GPUs,” reads the release. It then goes on to list address a variety of accusations, but key among them is the fact that Slightly Mad worked with both AMD and Nvidia to make the best game possible for both hardware setups. 

“Direct involvement with both nVidia and AMD has been fruitful in assisting with the game performance at various stages of development. Both AMD and nVidia have had access to working builds of the game throughout development, and they have both tested builds and reported their results and offered suggestions for performance improvements,” says the release. 

“Testing of the game with different driver versions has produced a variety of performance results on both nVidia and AMD hardware. This is entirely to be expected as driver changes cannot always be tested on every game and every card, and this is the reason why both companies produce game-specific driver profiles, to ensure that they can get the best out of the game.”

As for Nvidia-specific technologies, Slightly Mad points out that Project CARS does not use a specific particle technology exclusive to Nvidia, but actually uses a modified version of technology developed for Need for Speed: Shift and Shift Unleashed. That was tech developed in-house by Slightly Mad themselves. 

Further points made by the release are:

  • Project CARS is not a GameWorks product. We have a good working relationship with nVidia, as we do with AMD, but we have our own render technology which covers everything we need.
  • NVidia are not "sponsors" of the project. The company has not received, and would not expect, financial assistance from third party hardware companies.
  • The MADNESS engine runs PhysX at only 50Hz and not at 600Hz as mentioned in several articles
  • The MADNESS engine uses PhysX for collision detection and dynamic objects, which is a small part of the overall physics systems
  • The MADNESS engine does not use PhysX for the SETA tyre model or for the chassis constraint solver (our two most expensive physics sub-systems)
  • The MADNESS engine does not use PhysX for the AI systems or for raycasting, we use a bespoke optimised solution for those
  • The physics systems run completely independently of the rendering and main game threads and utilises 2 cores at 600Hz
  • The physics threading does not interact with the rendering, it is a push system sending updated positional information to the render bridge at 600Hz
  • Any performance difference with PhysX would not be reflected with differences in comparing rendering frame rates. There is no interaction between PhysX and the rendering
  • Overall, PhysX uses less than 10% of all physics thread CPU on PC. It is a very small part of the physics system so would not make a visual difference if run on the CPU or GPU

Understandably Slightly Mad Studios are upset over the allegations made on Reddit, but this press release certainly cements the studios version of the story. Hopefully it will go a long way to clear up any doubts players have.

Thanks, Gamasutra

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MrJinxed avatarxNuke avatarPostieDoc avatarBelimawr avatar
xNuke Avatar
xNuke(8 hours played)
2 Years ago

I have a few friends who favour AMD over Nvidia saying they perform the same, yet cost less and then they complain that they can't run the game as well as someone with an nvidia card saying it's the devs fault. You get what you pay for. This has always been true.

MrJinxed Avatar
2 Years ago

It's become the norm when AMD doesn't perform as well. They either whine publicly, or the people using it does, and it creates this sort of a mess where the developer has to defend themselves for no good reason.

PostieDoc Avatar
2 Years ago

Although I have a 780ti in my current rig, there have been some great AMD cards in recent times (the 7970Ghz springs to mind).

There are some R9 290x (Sapphire I think) out there that are available for nearly half the price of a 980 at the moment, so xNuke you can see where their argument comes from.

The problem is quite often the drivers, which AMD aren't as on-the-ball with as Nvidia. A little patience and they soon get sorted.

I'm looking forward to the release of the R9 390x soon with its new HBM technology.

We need AMD to stay relevant.

Belimawr Avatar
2 Years ago

AMD do need to stay relevant, they also need to get back fighting Intel on the high end CPU's, a single party market is only ever bad for the consumer, every market needs it's competitors to keep the markets striving to be better for the consumer.


this is why stuff like the console wars are comical, the fanboys want the other side to die, but if you didn't have Sony it has already been shown what MS would be doing with console, this is why I will always cheer a 2 or more party market as it forces the makers of the item to please the user or they go to the alternative.


this is why I wanted steamOS to be more than it is, as at the moment PC gaming is suffering due to MS running unopposed in the PC market for OS.