What graphics card do you have?
When did you last update the drivers for your graphics card?
I got a 1070Ti and the latest driver 457.30 from last week or so. I noticed since I updated my driver in October, and now recently, that stutters are back again.
Happens every 5min or so. Really frustrating when you are in a close dog fight and that micro-freeze of half a second can turn the dog fight from your favor, to working against you. Got really mad about it last night.