prccowboy

Thanks for the feedback BabyPapa. I took your message to mean that you use the default DCS:BS Nvidia profile and only change SLI compatibility DX10+DX11 bits to 0x081000F5 (Dirt 3, Dirt Rally). I just tried that and hit the best fps I've ever seen in Nevada (about 100% boost); however, I still don't see any change in Caucasus terrain - Given the low gpu utilization that I'm seeing on that terrain, something else must be bottlenecking on my rig with that map.

So, it's not just me then - not sure if that makes me feel better or worse. BTW, Nice screenshot

b00ce, what compatibility bits are you using? driver? I get a 75-90% boost in framerates with SLI on the Nevada map. I think that's worth consideration. This post is not a debate on whether SLI works in DCS, because it DOES (with profile tweaking). However, I would like to understand why it works with one terrain and not another for me.

Have you tried forcing SLI off and doing a comparison? My point is that I don't see any performance increase in Caucasus (in fact, performance drops) when using SLI. However, SLI does give me a boost in NTTR map

I thought the same, but it looks annoying. I also haven't seen this in anybody else's screenshots of 2.5 so I was wondering if it's just my setup.

With 2.5OB Caucasus, I am seeing a strange horizontal line (flat plane?) in the middle of the trees at medium distance. See attached photo. When I get closer and the detail increases, the trees look fine. Is it supposed to look like this?

Does anybody have SLI working in 2.5 with Caucasus? <=This was my original question edit (with latest findings): SLI does WORK in 2.5, but: Ultimately your performance is either limited by your CPU or GPU. Think of it as 2 guys running a race but tied together by a rope. If one is slow, he limits the speed of the other. In DCS, when the CPU gets maxed out then the gpu becomes underutilized and vice versa. Initially, I thought SLI wasn't working in 2.5 Caucasus because I was getting similar results with no sli (one gpu at 97% utilization) vs. SLI running (but both gpu's running below 50%). It turns out that one of my cpu cores was maxed so one videocard was enough to keep up with the cpu (and two cards was overkill). If I reduced cpu load but ran only one videocard then I still saw no improvement in fps (now my gpu was the bottleneck) However, I now have my cpu maxed and both gpu's running SLI at about 98% utilization and see a huge improvement in performance (now my cpu doesn't slow down my video cards and vice versa) I have written a guide to SLI setup (post #65) => HERE Everybody has a different rig and will have different bottlenecks, but the point of this post is to confirm SLI does work but performance will vary if you have something else bottlenecking your framerates.