As we’re seeing a trend that SLI and CrossFire aren’t supported quite that much anymore, Project Cars 2 surprised us in a positive way. First we’ll look at the scaling of running two RX580s in CrossFire. We can see decent gains in pretty much every resolution/settings combination, up to around 70% on 4K. Unfortunately, this setup is still not able to manage 60 fps at 4K and Ultra but WQHD and Ultra settings are perfectly playable when in CrossFire, while the game is all but unplayable on one card.
|RX 580||RX 580 CrossFire||Verschil|
|1920x1080 - medium||134 fps||158 fps||18%|
|1920x1080 - ultra||63 fps||89 fps||41%|
|2560x1440 - medium||104 fps||156 fps||50%|
|2560x1440 - ultra||50 fps||75 fps||50%|
|3840x2160 - medium||62 fps||109 fps||76%|
|3840x2160 - ultra||32 fps||52 fps||63%|
Looking at SLI, where we can see a negative result on medium settings due to CPU bottlenecking, the results on 4K and Ultra are a lot more promising, showing an increase in performance of 68%.
|GTX 1080 Ti||GTX 1080 Ti SLI||Verschil|
|1920x1080 - medium||245 fps||192 fps||-22%|
|1920x1080 - ultra||144 fps||152 fps||6%|
|2560x1440 - medium||223 fps||191 fps||-14%|
|2560x1440 - ultra||110 fps||150 fps||36%|
|3840x2160 - medium||144 fps||190 fps||32%|
|3840x2160 - ultra||74 fps||124 fps||68%|