I finally managed to get a genuine VRAM OOM last night.

- A2A Cherokee.
- Latin VFR KMIA 5.0

- AIG traffic 100%, henrik;s ships at 100%.

- Road traffic at 100%.

- orthoscenery at 0.5 cm per pixel.

- autogen all at max, delivering a few million Miami houses via Realworld Scenery.

- Sliders to the right, including dynamic reflections, with Truesky on.

Running a 2080Ti. 
 

In short, with the recommended video card P3Dv5 will cope with a lot. But it also gives us the freedom to push the sliders way too far if we want.

Flightsim has always been this way. It’s always had the potential to bring cutting-edge hardware to its knees, and therefore required some finely-tuned tweaking of the sliders.

I often exceed 9gb of vram usage in 4.5 using vr, doesn't look like I'll be upgrading to v5 for quite some time.  

2 minutes ago, Pilot53 said:

I often exceed 9gb of vram usage in 4.5 using vr, doesn't look like I'll be upgrading to v5 for quite some time.  

Vr is a bit rough but OK in v5. As someone who mainly flies in VR, i still much prefer the new sim to v4.5

6 hours ago, DJJose said:

Is there an 8gig version? I have not seen one.

The 2080TI card is the recommended card by LM. This is probably why so many are confused about how much vRAM they are going to need. Once we start loading up our sims, we need to lower our settings in order to avoid an OOM error or avoid poor performance.

Isn't this, in a way, what we have been doing for over a decade?

And for some strange reason owners of 2080 TI have issues.....Go figure....But will see after HF. Apparently they found something.

6 hours ago, Mroberts95 said:

Just wait til the fall when NVIDIA 3080 will have 10gb and 20gb options available and I am sure the 3080ti will probably only be a 20gb option.

And all that for a measly 2000 bucks...

1 hour ago, Rob_Ainscough said:

I posted a video about VRAM usage in P3D V4.5 and XP some time ago.  I’m not permitted to post about VRAM usage for MSFS.

The issue isn’t DX11 vs DX12 in terms of VRAM, its the nature of flight simulators which push view distance and object density and polygon count far higher than 3D shooter and similar games.

In my testing, DX12 uses a little less VRAM in V5 than V4.5 ... but still over 12GB with my tweaks and max settings.  

To reduce your VRAM usage, simply set your texture set to 2048.  LM have been working on reducing VRAM usage, but in my texting I only see about 600MB less with default scenery.

What should not happen is a CTD or DEVICE_HUNG when running out of VRAM, thats a bug.

Some DEVICE_HUNG errors can be mitigated a little by reducing GPU overclocking.

24GB of VRAM is not that expensive, adding another 13GB VRAM to a 2080Ti is $140 (not $1200) in chips cost, probably less for someone like nVidia ... petition nVidia to stop raking us over coals.

Cheers, Rob.

 

Out of curiosity, what should happen when running out of VRAM? 

you will get the same message, but it should work after you click to modify your settings. Right now is not working, sometimes it doesn’t even show you the message.

Edited April 28, 20206 yr by ttbq1

Well LM is on the right track, because when I'm not experiencing a CTD, the sim runs so smooth. Even over Los Angeles which has always been a no fly zone for my old rig. Really something incredible. And in my view, we need a quality alternative to MSFS. Not sure I'm interested in a pay to play scheme.  

1080p is the future, guys!

 

20 hours ago, Sesquashtoo said:

Previous API's did the memory management for them as the textures were in system memory and the graphics API took care of swapping textures to VRAM as and when required. The developers didn't have to worry about the amount of free VRAM and the API managed all that for them. 

 

14 hours ago, cepact said:

I don't believe the author is right

I both develop in vulkan and opengl

There are no background process that switches textures between RAM and VRAM in OpenGL

OpenGL and Vulkan both allow to send textures directly to the VRAM, its nothing new.

The only advantage of Vulkan is its multi thread abilities and gives more access to certain functionalities

 

When I read the first post and some of you follow-up reaction, I really think we need more time to figure out all these and create our own experience with knowledgeable people. Hard to find good reference point.

Not to mention that a fix is expected soon, so thinks will changed and the label (Beta) written on the TrueSky feature still scared me (remind me the DirectX10 on FSx). Early adopter (that I'm part of) will have to explore a lot.

Edited April 28, 20206 yr by vbazillio

Anyone tried P3D v5 with the AMD Radeon 16gig cards?

13 hours ago, OzWhitey said:

Flightsim has always been this way. It’s always had the potential to bring cutting-edge hardware to its knees, and therefore required some finely-tuned tweaking of the sliders.

Perfect! I always hope that new simulator releases max out the current generation HW when they are released. That gives the sim long legs for sure.  I've often wondered where the 'end' to P3Dv4.5 really is from the perspective of if I could run it on a machine that could handle everything that 4.5 is capable of throwing at it. How would it run and what would it look like on the theoretical i9-13000K with an RTX 5080Ti?

Can you imagine how both versions will run on the HW we get 3-5 years down the road? It's going to be fantastic.

Final thought. Developers have the same level of control over what they remove from VRAM as they do with what they put into it. The APIs are not the issue. Management of what is IN VRAM at any given point in time is the issue. The devs will learn the techniques to manage VRAM better as they get more familiar with the new APIs. They can't keep loading new things into it without removing things that are no longer needed first.

Edited April 28, 20206 yr by MDFlier

2 hours ago, Christopher Low said:

1080p is the future, guys!

 

I have a 1080p monitor and I run v5 with the in sim resolution set at 1920x1080x32 (I can go as high as 3340x2160x32 but I don't). I have all the sliders full right and I haven't had any issues so far. (I have a GTX 1080 graphic card)

I run P3Dv4 @ 1920x1080 resolution on a 24" monitor, and there is no way that I am changing that when I upgrade to P3Dv5. Spending silly money on a graphics card just so that I can run at 4K resolution is not part of my budget

Edited April 28, 20206 yr by Christopher Low

16 hours ago, Sesquashtoo said:

Do you think MSFS20 will suffer from this...or users as a result?  I guess we don't even know to date, that it WILL be running DX12?!?!?

MSFS2020 is DX11 only,