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DCS 2.5 optimum monitor refresh rate


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So what's the verdict on monitor refresh rate and DCS 2.5:

Q1) Do I *need* 60FPS+ for, say dog fighting?

Q2) Can we define an "optimum refresh rate" for the sim?

Regards, Django.

| BMS | DCS OB | A-10C II | AV-8B | F-16C | F/A-18C | FC3 | Persian Gulf | Supercarrier | Tacview | XP11 | FF A320 | FF 757 |

| I7-9700K + NH-D15 | RTX3080Ti 12GB | DDR4-3200 16GB | Aorus Z390 Ultra | 2X Evo 860 1TB | 850W | Torrent Case |

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In my opinion:

 

Q1) no

Q2) I think this has a lot to do with personal perception. I myself can't see a difference between 60Hz and 120Hz. Others can.

Windows 10 64bit, Intel i9-9900@5Ghz, 32 Gig RAM, MSI RTX 3080 TI, 2 TB SSD, 43" 2160p@1440p monitor.

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I went recently for ordinary 60 Hz 32" one, as the rest of my hardware is not capable of rendering stable 120+ with high options anyway. Neither is yours, judging from your signature, so that's something to keep in mind when planning new purchase.

i7 9700K @ stock speed, single GTX1070, 32 gigs of RAM, TH Warthog, MFG Crosswind, Win10.

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I've just done some testing with DCS on both a 980Ti and a new 1080Ti.

With my GFX settings I'm getting 45 to 70 FPS with the 980 and 60 to 90 with the 1080.

 

Most interestingly, I don't find playing at 45 FPS to be obviously annoying. Once above 60Hz I find it hard to see any appreciable difference in "smoothness" for DCS, and maneuvering is not difficult at all.

 

This experience has convinced me that a 75Hz screen would be asbolutely fine for DCS. 60Hz would also be acceptable, it in no way makes the game unplayable.

 

I intend to have a YouTube video up in the next few days with the testing results and a short discussion about what FPS values are polayable and whether or not the differences in the ranges above are noticeable for me.

 

(I have good eye-sight and do not need corrective visison - "bad eyesight" is sometime used as an argument to discredit people who say they don't observe major differences in these framerates)


Edited by philstyle

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It does make a difference, but it depends what airframe you fly...and how high you fly.

 

45 fps is a nightmare for the Mi-8 and any other helis, the birds become rough & tough to fly.

 

The faster you fly, say Mach 1, in low level flight, the more difference it makes. I can show you 1 run at 144Hz and 1 run at 60Hz. If you dont see the difference you must be blind or unwilling to accept.

 

But to keep true to myself, I have settled with 60-100fps now with 2.5 OB but maxed out the settings. I do "feel" the difference, but it is my personal trade off for the high LOD.

 

60 is ok, but dont say it doesnt get better with more...and 45 fps is borderline with helis and moments when you need lots of stick input to manouver.


Edited by BitMaster

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I intend to have a YouTube video up in the next few days with the testing results and a short discussion...

 

Great, it would be good to see some monitor videos orientated towards flight sim.

Regards, Django.

| BMS | DCS OB | A-10C II | AV-8B | F-16C | F/A-18C | FC3 | Persian Gulf | Supercarrier | Tacview | XP11 | FF A320 | FF 757 |

| I7-9700K + NH-D15 | RTX3080Ti 12GB | DDR4-3200 16GB | Aorus Z390 Ultra | 2X Evo 860 1TB | 850W | Torrent Case |

| Warthog HOTAS + CH Pedals | 32" TV 1080p 60Hz | TrackIR5 |

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you can do that by math.

 

Setting: Mach 1 ~ 330m/sec --> TV tower 100m tall / 60 fps, 1 km away

 

as you approach the TV tower ( and every other object ) they must appear bigger with every single frame that you look at. From a certain point in size and frequency your eye starts to see

2 things, a hopefully fluent, Gsynced screen, wonderful...and a TV tower that rather jumps towards you in steps than it scales bigger with many more steps in between...and thus appears fluent to your eyes, matchimng the actual overall scene being fluent.

 

You could, in one way say, it's one special kind of Antialiasing.

 

In our example, you have 60 frames per second and you ~ need 3 secs to merge the tower, that is 180 frames...but lets forget the last second, because the tower will be bigger than your displayed scene. We look at the first two seconds.

 

120 frames for a thing as small as 1 inch tall to become as tall as your screen is high. You can now easily see the effect, the step up effect or scale bigger effect, it comes in quantums, it's not analog, it's not related to Gsync or Vsync in any way but plays the same game on the same field and if you disobey that player, you might loose your game, your fluent gameplay.

 

I can accept 60 fps for choppers as they are slow and 60 is still ok for hovering precisely.

 

When I jump into a jet, i really want a three digit fps value in LLF, it makes a big difference to me as I pay attention to it, or my eyes do, if I want it or not.

 

Gsync is nice, but it wont fix that at certain low fps

Gigabyte Aorus X570S Master - Ryzen 5900X - Gskill 64GB 3200/CL14@3600/CL14 - Asus 1080ti EK-waterblock - 4x Samsung 980Pro 1TB - 1x Samsung 870 Evo 1TB - 1x SanDisc 120GB SSD - Heatkiller IV - MoRa3-360LT@9x120mm Noctua F12 - Corsair AXi-1200 - TiR5-Pro - Warthog Hotas - Saitek Combat Pedals - Asus PG278Q 27" QHD Gsync 144Hz - Corsair K70 RGB Pro - Win11 Pro/Linux - Phanteks Evolv-X 

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...i really want a three digit fps

 

So I'm going to need a GTX1080 or better?

Regards, Django.

| BMS | DCS OB | A-10C II | AV-8B | F-16C | F/A-18C | FC3 | Persian Gulf | Supercarrier | Tacview | XP11 | FF A320 | FF 757 |

| I7-9700K + NH-D15 | RTX3080Ti 12GB | DDR4-3200 16GB | Aorus Z390 Ultra | 2X Evo 860 1TB | 850W | Torrent Case |

| Warthog HOTAS + CH Pedals | 32" TV 1080p 60Hz | TrackIR5 |

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Yes

 

 

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Gigabyte Aorus X570S Master - Ryzen 5900X - Gskill 64GB 3200/CL14@3600/CL14 - Asus 1080ti EK-waterblock - 4x Samsung 980Pro 1TB - 1x Samsung 870 Evo 1TB - 1x SanDisc 120GB SSD - Heatkiller IV - MoRa3-360LT@9x120mm Noctua F12 - Corsair AXi-1200 - TiR5-Pro - Warthog Hotas - Saitek Combat Pedals - Asus PG278Q 27" QHD Gsync 144Hz - Corsair K70 RGB Pro - Win11 Pro/Linux - Phanteks Evolv-X 

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I agree. Having a GSYNC panel does wonders. You WILL notice the difference between 60 and 120+ when you use TrackIR and scan from either side. On a fixed viewpoint, you might not appreciate the effect.

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I agree. Having a GSYNC panel does wonders.

 

At 1440p would you rather have a GSync 17" panel than a non-GSync 32"?

Regards, Django.

| BMS | DCS OB | A-10C II | AV-8B | F-16C | F/A-18C | FC3 | Persian Gulf | Supercarrier | Tacview | XP11 | FF A320 | FF 757 |

| I7-9700K + NH-D15 | RTX3080Ti 12GB | DDR4-3200 16GB | Aorus Z390 Ultra | 2X Evo 860 1TB | 850W | Torrent Case |

| Warthog HOTAS + CH Pedals | 32" TV 1080p 60Hz | TrackIR5 |

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I just upgraded to the monitor in my sig. I was on 1920 x 1200 @ 60Hz. It was fine but needed/wanted something better for work and after much research, I'd really recommend looking at something like a 34" ultrawide with G-Sync or FreeSync. It's much easier to drive a 2K display than 4K and ultrawide with FreeSync is so immersive with track IR.

 

I happened to get an AMD card recently, so fortunately FreeSync is a bit cheaper than G-Sync. Variable refresh rate is definitely a great feature if you can get it, and silky smooth 48-100Hz is what my panel does. My RX 580 overclocks pretty well, but I basically get 65-75FPS in most situations and usually it's a bit higher than that.

 

That's 3440 x 1440px, 8x Ansiotropic, low shadows, low civ traffic, medium water, everything else is on max. Hope that helps.

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Samsung 960EVO NVMe for DCS and Windows 10 w/ other storage for stuff

 

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Although i have seen fps well past 100 on my machine, I found that checking off Vsync in the settings which limits it to 60 gives more consistency to my flight behaviour especially on landings.

Picking Default in the Nvidia control panel and checking off Vsync in game really seems to have helped me a lot.

It no longer glitches out if it gets busy like when my wingman flys past me just as I am coming in for a landing.

Now I see 60 fps rock steady across the board and I have not missed one single landing in a week which was not the norm before.

That is a lot of landings for me. We are talking a Spitfire.

Good to go.

Win 10 pro 64 bit. Intel i7 4790 4 Ghz running at 4.6. Asus z97 pro wifi main board, 32 gig 2400 ddr3 gold ram, 50 inch 4K UHD and HDR TV for monitor. H80 cpu cooler. 8 other cooling fans in full tower server case. Soundblaster ZX sound card. EVGA 1080 TI FTW3. TM Hotas Wartog. TM T.16000M MFG Crosswinds Pedals. Trackir 5.

"Everyone should fly a Spitfire at least once" John S. Blyth

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