Low(ish) FPS with DCS 2.5.

Having low FPS issues running 2.5 at 4k (3840x2160) I am averaging 25-35 FPS on a fast mission with all units settings at medium. I am running the game at a High (-) settings. 4k, most settings on high, heat haze off, DoF off, Shadows on Med. Using deferred shading on, AA at 8x MSAA at 4x

System:

Win10 Home 64 bit

GPU: 2x GTX 1080 (Running SLI, overclocked to 2100/5556 on both.)

CPU: i7 - 7700K 4.20GHz

RAM: 32Gb

DCS installed on a M.2 SSD.

Ideas? Or am I just expecting too much?

I’m runnng 4K all Max settings very well. Try reducing AA to 2x. It’s a frame rate killer in 2160p

Turn Vertical Sync off everywhere.

Holy schnickies. MSAA turned off resulted in a jump to 80+ FPS sitting on the runway on F2 view, and a solid 49-60 during intense air combat with about 15 aircraft. I did not realize MSAA ate FPS up. Will Aniscopteric FIltering effect anything to bad if I turn it up from 2x?

Holy schnickies. MSAA turned off resulted in a jump to 80+ FPS sitting on the runway on F2 view, and a solid 49-60 during intense air combat with about 15 aircraft. I did not realize MSAA ate FPS up. Will Aniscopteric FIltering effect anything to bad if I turn it up from 2x?

You have one heck of a computer!!

Turn Anisotropic Filtering up all the way to 16x. It makes the horizon *much* nicer and doesn't decrease framerates much, but does use a fair amount of video memory--which you have lots of (8GB.)

Turn off ALL antialiasing in Nvidia Control Panel.

Set MSAA to 2x in DCS World--no higher than that, it isn't needed for a 4K display. If it affects framerates too much, turn it off, and just use FXAA either in Nvidia Control Panel, or in a program like Reshade.

Rock & roll! :)

AD

Oh yeah, I almost forgot--you have two GTX 1080s. Consider selling both of them and getting one GTX 1080 Ti. It'll probably perform better. :)

Similar for me.... I turn off MSAA and Vsync off in DCS and turn on FXAA and Vsync in Nvidia CP.

Yes I found that turning Vsync off in DCS almost doubled my FPS with no tearing. I’m experimenting with “Fast” Adaptive in Nvidia CP that seems to work well.

I get low points at about 50 flying over Vegas but 60+ normally.

GPU: 2x GTX 1080 (Running SLI,

Are you using the default SLI profile or did you create a custom? If using default, you are probably NOT getting SLI benefits in DCS.

see my guide here for setting up SLI in DCS:

https://forums.eagle.ru/showpost.php?p=3410823&postcount=65

Anti-aliasing is a filter applied to every edge of every object in rendering range... In DCS this means thousands of objects over a couple hundred miles potentially. So yeah... It knocks you in the head.