Forza Motorsport 7 Performance Preview - Vega vs Pascal
Forza Motorsport 7 Performance
The first full Forza Motorsport title available for the PC, Forza Motorsport 7 on Windows 10 launched simultaneously with the Xbox version earlier this month. With native 4K assets, HDR support, and new visual features like fully dynamic weather, this title is an excellent showcase of what modern PC hardware can do.
Now that both AMD and NVIDIA have released drivers optimized for Forza 7, we've taken an opportunity to measure performance across an array of different GPUs. After some significant performance mishaps with last year's Forza Horizon 3 at launch on PC, we are excited to see if Forza Motorsport 7 brings any much-needed improvements.
For this testing, we used our standard GPU testbed, including an 8-core Haswell-E processor and plenty of memory and storage.
|PC Perspective GPU Testbed|
|Processor||Intel Core i7-5960X Haswell-E|
|Motherboard||ASUS Rampage V Extreme X99|
|Memory||G.Skill Ripjaws 16GB DDR4-3200|
|Storage||OCZ Agility 4 256GB (OS)
Adata SP610 500GB (games)
|Power Supply||Corsair AX1500i 1500 watt|
|OS||Windows 10 x64|
|Drivers||AMD: 17.10.1 (Beta)
As with a lot of modern console-first titles, Forza 7 defaults to "Dynamic" image quality settings. This means that the game engine is supposed to find the best image settings for your hardware automatically, and dynamically adjust them so that you hit a target frame rate (adjustable between 30 and 60fps) no matter what is going on in the current scene that is being rendered.
While this is a good strategy for consoles, and even for casual PC gamers, it poses a problem for us trying to measure equivalent performance across GPUs. Luckily the developers of Forza Motorsport 7, Turn 10 Studios, still let you disable the dynamic control and configure the image quality settings as you desire.
One quirk however though is that in order for V-Sync to be disabled, the rendering resolution within the game must match the native resolution of your monitor. This means that if you are running 2560x1440 on your 4K monitor, you must first set the resolution within windows to 2560x1440 in order to run the game in V-Sync off mode.
We did our testing with an array of three different resolutions (1080p, 1440p, and 4K) at maximum image quality settings. We tested both AMD and NVIDIA graphics cards in similar price and performance segments. The built-in benchmark mode for this game was used, which does feature some variance due to dynamic weather patterns. However, our testing within the full game matched the results of the benchmark mode closely, so we used it for our final results.
Right off the bat, I have been impressed at how well optimized Forza Motorsport 7 seems to be on the PC. Compared to the unoptimized disaster that was Forza Horizon 3 when it launched on PC last year, it's clear that Turn 10 Studios and Microsoft have come a long way.
Even gamers looking to play on a 4K display at 60Hz can seemingly get away with the cheaper, and more mainstream GPUs such as the RX 580 or the GTX 1060 with acceptable performance in most scenarios.
Games on high-refresh-rate displays don't appear to have the same luxury. If you want to game at a resolution such as 2560x1440 at a full 144Hz, neither the RX Vega 64 or GTX 1080 will do this with maximum image quality settings. Although these GPUs appear to be in the margin where you could turn down a few settings to achieve your full refresh rate.
For some reason, the RX Vega cards didn't seem to show any scaling in performance when moving from 2560x1440 to 1920x1080, unlike the Polaris-based RX 580 and the NVIDIA options. We aren't quite sure of the cause of this and have reached out to AMD for clarification.
As far as frame times are concerned, we also gathered some data with our Frame Rating capture analysis system.
Taking a look at the first chart, we can see while the GTX 1080 frame times are extremely consistent, the RX Vega 64 shows some additional variance.
However, the frame time variance chart shows that over 95% of the frame times of the RX Vega 64 come in at under 2ms of variance, which will still provide a smooth gameplay experience in most scenarios. This matches with our experience while playing on both AMD and NVIDIA hardware where we saw no major issues with gameplay smoothness.
Forza Motorsport 7 seems to be a great addition to the PC gaming world (if you don't mind using the Microsoft store exclusively) and will run great on a wide array of hardware. Whether or not you have a NVIDIA or AMD GPU, you should be able to enjoy this fantastic racing simulator.