Last year, DCS ran smooth as glass. Then after major update this past summer,(1.5 I believe) DCS will run very smoothly for 3 to 4 seconds , then will hesitate for 1/4 second. Every 4 or so seconds there is a pause. On advice I found on the forum, I have upgraded my video card to a Radeon RX 480 with 6 gigs of memory. It made no difference. What else would cause this condition? I have a Windows 10, 64 bit system.