Forza Horizon 4 PC Performance Review

Core Scaling - Is Forza Horizon 4 as CPU limited as its predecessor?

Forza Horizon 4 PC Performance Review

Core Scaling - Is Forza Horizon 4 as CPU limited as its predecessor?

Forza Horizon 3 released with a severe CPU performance limit, making a steady 60+ FPS framerate difficult to achieve in demanding scenes, where large numbers of vehicles are present or in other built-up areas. While this was addressed later in a post-launch patch, thanks to the addition of increased multi-threading to the game's engine, we are still left wondering how CPU performance will stack up in its sequel. 

To put it simply, Forza Horizon 4 is easy to run at 60+ FPS on modern processors, with the game being able to take advantage of more than four cores. If anything, Forza Horizon 4 is showcasing that the death of the quad-core PC gaming era is coming and that the era of high-core count PC gaming is about to get started.  

Using our dual-core, quad-thread system configuration, we found that Forza Horizon's performance levels dipped significantly, with the game becoming full CPU limited, presenting plenty of micro stutters and dips below 60FPS at 1080p when using an RX Vega 56 at Ultra settings. Moving to a fully-fledged quad core is enough to keep Forza Horizon 4 above 60FPS, but that doesn't mean that the game is fully GPU limited, with Forza Horizon requiring a quad-core processor with Hyperthreading/SMT to become GPU limited. 

If we move to more powerful GPU hardware, we can see Forza Horizon 4 become CPU limited once again, but at that stage, the game is already running at 100+ FPS at all times.  

Forza Horizon 4 PC Performance Review    

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Most Recent Comments

05-10-2018, 16:45:39

Considering 1080p is my best (poor eye sight) I'm well impressed at how well it runs on Ultra, and I do like the Forza Horizon gamesQuote

06-10-2018, 03:30:11

Vega 64 only 1.6FPS behind a 1080 Ti at 1440P, Impressive.Quote

06-10-2018, 05:48:32

Originally Posted by Dicehunter View Post
Vega 64 only 1.6FPS behind a 1080 Ti at 1440P, Impressive.
Yeah, Forza is a great showing on Radeon's Vega graphics cards. It's well strange that the RX 580 and GTX 1060 are level pegging, but the Vega 64 demolishes the GTX 1080.

Anyway guys, all feedback is appreciated here. Feel welcome to post criticism, especially for the video, as it is our first time doing that.Quote

06-10-2018, 11:21:13

Wow, that is the first time I've ever seen Vega match a 1080Ti in gaming. Even games that favour Vega specifically like Far Cry 5 and Wolfenstein II don't show Vega being on par with the 1080Ti; it was always still slightly behind, at least from what I've seen and remember. Very impressive.

Also, OC3D's video game analysis articles are one of the only places I know of that shows performance scaling with different in-game settings. There's nothing worse than seeing a graph for a game where a GTX 1080 or Vega 64 can't hit 60 FPS at 1440p in a new game at max settings but easily hits 80 FPS with just a couple of superfluous settings turned down or off. So thanks very much for the extra work.

On a similar note, what I think could be the best way to test a game is to have target FPS points. So for instance you'd have a GTX 1050/RX 460, GTX 1060/RX 580 and GTX 1080/Vega 64 comparison, and you'd show what the graphics settings would need to be in order to hit 60, 90 or 120 FPS, maybe with screenshot comparisons as you guys already do. So if I had a GTX 1060, I'd know that in AC Odyssey I'd have to use FXAA and High shadows in order to hit 60 FPS at 1080p, or I'd have to turn off a couple of other things to hit 90 FPS. The same thing for the other cards. It would take a lot of work and may not be possible for most, but it would be the best way to do things in my opinion. I always appreciated Nvidia's breakdown of AAA games and their graphics settings. It basically meant that if I had for example a GTX 970 and still wanted to hit 60 FPS at 1080p, I'd know that either I'd need to upgrade my graphics card, or how far I'd have to reduce the in-game settings to hit that point, or whether that was something I was willing to do.

Again, excellent work, Mark and all those involved.Quote

06-10-2018, 11:22:23

Look at the vega 56 compared to 1080 too!Quote

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