Would someone mind talking me through the benefits of DX12? I'm currently on DX11 and wondered if I should switch.

8 minutes ago, BWBriscoe said:

Would someone mind talking me through the benefits of DX12? I'm currently on DX11 and wondered if I should switch.

The biggest difference might be if you had a more recent card and could use Frame Generation.

6 minutes ago, HiFlyer said:

The biggest difference might be if you had a more recent card and could use Frame Generation.

What difference would it make to a NVIDIA GeForce RTX 2080 Ti?

37 minutes ago, BWBriscoe said:

What difference would it make to a NVIDIA GeForce RTX 2080 Ti?

https://forums.flightsimulator.com/t/direct-x11-vs-direct-x12/579304

12 minutes ago, HiFlyer said:

https://forums.flightsimulator.com/t/direct-x11-vs-direct-x12/579304

Thanks, but I'm not sure that post helped. As I said...I need an idiots guide!!

I might sound like an word not allowed, but why don't you try the difference for yourself and see what works best for YOUR machine and YOUR eyes.

DX12 is a newer 'technology', but that does not mean it will benefit you on older cards.

DirectX 12 is a lower level API, that technically allows developers much more freedom but also allow higher draw calls, better parallelization etc. all the fancy marketing buzz.

However, most implementations, like with MSFS, is just a barebone method of simple conversion and translation calls from DX11 to DX12, which offers little to nothing in terms of performance. Basically just a foundational implementation that allows for future rework and modification to real DirectX 12. It has been a bit of a problematic implementation so far, initially with lower performance and more stutters that have been solved, to texture issues that are gone now with SU15, however you still have minor stuff some people experience (including myself) of occasional white flashes with bloom enabled and DX12.

However, if you have no intentions of using the DirectX 12 specific stuff, like frame generation, there's no real reason to use it.

35 minutes ago, Sethos said:

DirectX 12 is a lower level API, that technically allows developers much more freedom but also allow higher draw calls, better parallelization etc. all the fancy marketing buzz.

However, most implementations, like with MSFS, is just a barebone method of simple conversion and translation calls from DX11 to DX12, which offers little to nothing in terms of performance. Basically just a foundational implementation that allows for future rework and modification to real DirectX 12. It has been a bit of a problematic implementation so far, initially with lower performance and more stutters that have been solved, to texture issues that are gone now with SU15, however you still have minor stuff some people experience (including myself) of occasional white flashes with bloom enabled and DX12.

However, if you have no intentions of using the DirectX 12 specific stuff, like frame generation, there's no real reason to use it.

Thanks, that's very helpful. B

 

Tried it a few times since MFS was released, last time with the FG mod allowing to use it with a 3060ti, but I'm back in good old dx11... dx12 and FG don't convince me yet...

My experience is that with DX12 I have no problems with CTD. On the other hand, with DX11 I am not able to use the simulator. Constant CTD due to various libraries crashing, some red and white screens.
My hardware is: i5-4670, GTX 1600, 16BG RAM.
With GAIST ships, FSLTL (minimum settings) flying F-86 (one of the least CPU-intensive aircraft) fsp is 40 (I have it locked at 30 fps).

Tłumaczenie DeepL.

Edited May 25, 20242 yr by wiejag

Since I am using a gaming laptop, DX12 and Fgen paired with DLSS give me lower GPU temp and higher fps (DLSS). But I had stutters sometimes and tear screen. The former is almost completely solved by thus phenomenal SU15, and the later is easily fixed by switching to window mode and back to full screen (ALT + ENTER). Im planning to build a new PC though but that's another story.

My spec is i7 12650 + RTX 3050 + 16 GB RAM, aka, MSI GF Series 

 

 

On my rig, DX12 runs significantly faster than DX11 and DLSS runs a lot quicker than TAA.  If all was equal, I would use DX11 and TAA all the time and I dare say that would be fine on a vanilla msfs installation but with all the addons I use, not so great.

The main drawback with DX12 I have noticed is a big increase in VRAM usage.

I also use the FRG program and AutoFPS to squeeze every last bit of performance out of the sim 

Running a 5800X3D with an RTX3080 at 1440 BTW.

Imo with your older video card, there's no benefits. 

I still have terrain popping in dx12.  But I use it because of frame generation with my rtx 4080

Edited May 25, 20242 yr by ryanbatc

TAA || FG || DX12 || AMD Fidelity (whatever it’s called) 100 😉 || Auto FPS. || RTSS locked at 50 FPS || VSYNC on Nvidia CP ||. Can’t say I have noticeable stutters, but after SU15 I am seeing a bit of screen tearing when I change views looking around cockpit. Otherwise,

I may be lucky but, I’m happy with the results, getting almost constant 50 FPS, CPU \ GPU temps “peak 60, low 50’s” , “low to mid 50’s” respectively. My GPU VRAM (16GB) usage seems to stay around 25% (PMDG 738 at the moment). Also using FSHUD for AIG traffic injection. 

Edited May 25, 20242 yr by TomCYYZ

7 hours ago, ryanbatc said:

Imo with your older video card, there's no benefits. 

I still have terrain popping in dx12.  But I use it because of frame generation with my rtx 4080

Does FG give a noticeable visual difference or just show a higher FPS? Does it struggle with rapid view panning?

I have the same GPU and am considering giving it a go. Has you noticed any significant increase in VRAM usage?