Apologies for the necro, but I was having a similar issue, and thought I'd post my fix for anyone else having problems.
I don't know if the OP was running it on a laptop, but I experienced this issue ONLY when trying to run it on a laptop (with an nvidia card), it was perfectly fine on my desktop.
I discovered the laptop was automatically defaulting to using the onboard graphics rather than the discrete graphics card. Changing the setting completely fixed the stuttering for me.
Just open the nvidia control panel, manage 3D settings, select the game from the list, choose the discrete graphics card as the preferred processor, and apply.
Hope this is helpful for someone!