djib

Thanks beugnen, you've guided me to the right solution! I have used DPC Latency Check (suggested by a friend) to look for problems related to the sound card. In fact, it's not the sound card itself, but the game port that causes latency! I have disabled “Microsoft SideWinder Autodetection” in the device manager and now DCS is running perfectly. Thank you so much.

I find it hard to believe that it is a matter of specs. The game has exactly the same kind of lag in 3840x768 medium graphics than in 1024x768 low graphics with antivirus disabled and many other useless process (and services) killed. Also, the lag I'm talking about is there however complex the map is. I have my hard drives defragged. All my disk have at least 30GB of free space.

I agree, but what could explain that I only have the problem when the application has focus? Anyway, I have a Pentium E6420, 2G RAM, a Geforce 8800 GTS with 380MB memory. OS is Windows XP. My disk is a Samsung HD403LJ. Also, I have a Saitek X52 and a TH2GO. What else would you need to know? Oh, by the way, my graphic drivers are up-to-date, I tried very low resolution (1024x768) with low details, and I only use about 1GB of memory when running the game.

Hello, I'm having a strange problem: DCS lags at very regular intervals (about 2 or 3 seconds) when it has focus. When I focus on another window, DCS seems to be running smooth. I have tried disabling the antivirus, setting the process affinity, and killing most useless processes, I keep on having same the problem. Any idea where that could come from?