FalconPlot16 Posted May 5, 2019 Posted May 5, 2019 (edited) i have a strange problem on fps, it dips around 40's even 30's from 60-70 for 4 seconds and then it returns back to 70's. GPU usage is same i dont think there is bottleneck on the system. I upgraded my RAM to 16 GB still nothings changed. https://forums.eagle.ru/showthread.php?t=239281 Also someone is having my problem too. 2200G CPU RX 570 4 GB GPU 16 GB RAM Game is installed on SSD I also recorded a video watch carefully Edited May 5, 2019 by FalconPlot16
Tepnox Posted May 6, 2019 Posted May 6, 2019 Hi there. Because analysing the DCS performance becomes my second hobby (struggling with weird fps behaviours on my system too), I watched your video to check this case. Would be cool if you could include the frametime graph in the msi afterburner overlay next time (it makes it much more clear, when dips are occuring and how strong they are - also you see the general frame delivery much better). In your case, it is weird that the fps are dropping but the GPU-load stays around 95 to 99%. Normally, if you would be cpu or ram bottlenecked the GPU-load would shrink (because the gpu wants to deliver the frames but is waiting for the CPU/RAM - so the fps are sinking and so does the gpu-load). I could only assume, it is potentially a GPU bottleneck depending on the workload of the scenery in correlation with the shadow settings. Did you try your test run without shadows and low visibility? In my experience, the game-engine behaves very strange with enabled shadows and also the visib range can have a huge impact on the system (even you dont see that much of a difference, the effective object rendering in this game is pretty lazy and from the old times). I know it may be not that pretty (without shadows) but as I see it, I prefer smoother consistent delivered frames. The no-go for my system are shadows (all shadows). When enabling shadows, the consistency of frame delivery is gone and goes crazy all over the place... Ryzen 7 5800X3D // 64 GB RAM // RTX 4090 // Quest Pro // Quest 3
FalconPlot16 Posted May 7, 2019 Author Posted May 7, 2019 No i didn't tested without shadows but will do. Some people says it's insufficent VRAM but even i lowered my textures to medium issue still continues.
D.Va Posted May 7, 2019 Posted May 7, 2019 (edited) Almost certainly a VRAM issue. It's maxed out. Firstly, yes, performance on the Caucasus map is highly variable, for instance flying north low altitude above Kobuleti you will always get performance drops, but you are also flying the F/A-18C, which (still?) uses more VRAM than the other aircraft. I used to play with 4GB VRAM and maxed it out when flying the F/A-18C, just like you are and that caused performance drops. Try additionally lowering texture quality (cockpit and environment) and try another airplane in the same location. If performance drops persist, then you've just found a particularly poorly optimised part of the map. What you want to do really is get that VRAM use down from 4GB to 3.5GB. It's possible, but maybe difficult in newer releases. (Drops all the way into the 30 FPS range are usually VRAM-related, in my own experience) By the way here are my recommended options for a GTX 1060, which I think is about equivalent to your graphics card: Textures HIGH (unless you've got VRAM issues) Terrain Textures HIGH (unless you've got VRAM issues) Civ. Traffic HIGH Shadows HIGH Heat Blur HIGH Res. of Cockpit Displays 1024 EVERY FRAME Depth of Field OFF Lens Effects DIRT+FLARE Clutter/Grass 1500 Preload Radius 150000 Chimney Smoke Density 0 Gamma 2 Rain Droplets ON Disable Aero Interface OFF Vsync OFF (Force this outside of DCS!) Full Screen ON Scale GUI OFF Water MEDIUM Visib Range ULTRA Shadows HIGH MSAA 2X Motion Blur OFF SSAA OFF Trees Visibility 100% Anisotropic Filtering X4 Terrain Object Shadows FLAT Cockpit Global Illumination OFF Edited May 7, 2019 by D.Va Read my DCS 2.5 Optimisation Guide (version 2.5.4): https://forums.eagle.ru/showthread.php?p=3828073
FalconPlot16 Posted May 7, 2019 Author Posted May 7, 2019 Almost certainly a VRAM issue. It's maxed out. Firstly, yes, performance on the Caucasus map is highly variable, for instance flying north low altitude above Kobuleti you will always get performance drops, but you are also flying the F/A-18C, which (still?) uses more VRAM than the other aircraft. I used to play with 4GB VRAM and maxed it out when flying the F/A-18C, just like you are and that caused performance drops. Try additionally lowering texture quality (cockpit and environment) and try another airplane in the same location. If performance drops persist, then you've just found a particularly poorly optimised part of the map. What you want to do really is get that VRAM use down from 4GB to 3.5GB. It's possible, but maybe difficult in newer releases. (Drops all the way into the 30 FPS range are usually VRAM-related, in my own experience) By the way here are my recommended options for a GTX 1060, which I think is about equivalent to your graphics card: Textures HIGH (unless you've got VRAM issues) Terrain Textures HIGH (unless you've got VRAM issues) Civ. Traffic HIGH Shadows HIGH Heat Blur HIGH Res. of Cockpit Displays 1024 EVERY FRAME Depth of Field OFF Lens Effects DIRT+FLARE Clutter/Grass 1500 Preload Radius 150000 Chimney Smoke Density 0 Gamma 2 Rain Droplets ON Disable Aero Interface OFF Vsync OFF (Force this outside of DCS!) Full Screen ON Scale GUI OFF Water MEDIUM Visib Range ULTRA Shadows HIGH MSAA 2X Motion Blur OFF SSAA OFF Trees Visibility 100% Anisotropic Filtering X4 Terrain Object Shadows FLAT Cockpit Global Illumination OFF Man RX 570 is really VRAM limited card it should have 6 GB like 1060 has should've bought 8 GB version. Now i turned down shadows to low and disabled object shadows now it feels much better but not tested much only one mission.
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