I think that game is a bad joke…i’ve try with my i5 4670K@4,4GHZ and 2xSLI MSI 970 4G,horrible stuttering fest,micro stutters,big looong stutters,really embarassing.
Try with auto mode and also configuring graphics by myself,the graphics became everytime worse but still not a decent stable frame rate (i play with a 60hz monitor so, nothing particular).
Really a bad taste joke,for windows 10 as game platform and a big,big fail for DX12…cmon guys,find a real job ASAP!
I have same problems 
please fix.
I have the last drivers of all devices!!!
The title does not support multi-GPU scenarios, such as multiple physical graphics cards or cards with multiple integrated GPUs. In these scenarios only one of the available GPUs will be leveraged by the title.
Multi-monitor scenarios are not supported, Forza Motorsport 6: Apex currently only supports full screen in single screen scenarios at 16:9 and 16:10 aspect ratios.
Try disabling SLI-mode. see if that works better.
[Mod Edit - Abbreviated profanity, profanity and profanity that is disguised but still alludes to the words are not permitted - D]
LOL!!!
[Mod Edit - All posts to this forum must be in English. Please translate your message before posting - D]
https://translate.google.com/
I have the same problem. I made one race on spa and perfect, no stuttering, i continue playing and in the second race,in rio, starts to have a heavy stuttering i don’t understand why.
I have a i5 4590,8gb ram ddr3 and gtx960,playing in medium setting and 60 fps. I saw the page file loads to 10gbs! I think isn’t normal this load. I tried many configurations and putting the game to 30fps only,but same problem appears