Posting here because I am interested to here what is people's thoughts about this matter;

 

I am planning to buy a 27" monitor 2560 x 1440. Now I want the fastest video card for this. The Titan. However this has 6gb memory.

Planning to use 8GB or 16GB  on w7 64 bit. I am afraid this will end up giving me a lot of OOM's, with fully loaded add ons. I believe it's called VAS. But the memory of the videocard is bigger as what fsx will ever use 4gb?

 

Please keep this in the fsx forum, because I have read that more people have the same problems, and I want to see if it's because of all the addons, or memory or dx9,10 ore I might need to change to Prepar3d.

 

Also interested to hear from users with high memory video cards, especially Titans . 

 

Could someone clearly explain the memory usage in fsx dx9/10 or prepar3d? I am a real noob in this    :blink:

 

This started because of a other thread about looking for a monitor and video card. http://forum.avsim.net/topic/404225-best-monitor-for-fsx/

The memory size of the videocard does not matter, the amount of virtual memory that you actually use matters.

 

Lots of posts about getting OOMs with add-ons,  high LOD radius settings, and high resolution textures... even on 64 bit systems. Check the Crash to Desktop Forum.

 

The memory size of the videocard does not matter, the amount of virtual memory that you actually use matters

 

could you explain this a bit more?

Although Memory size does not matter on the GPU regarding how Fast FSX runs directly,

Ensuring your Graphics Card has enough is important, otherwise all textures will not show,

at bare minimum you will need 1024Mb Graphics Memory.

Although Memory size does not matter on the GPU regarding how Fast FSX runs directly,

Ensuring your Graphics Card has enough is important, otherwise all textures will not show,

at bare minimum you will need 1024Mb Graphics Memory.

Sara, I see you have a 4gb card, no problems with one, or just better texture loading?

Hi there,

Although that card is a little older now,

It works just fine attached to a 30" Screen for my purposes, so textures themselves are not an issue in that regards.

 

The one thing it won't save you is OOM, for instance, using the PMDG NGX or Coolsky DC9, plus photoscenery with treescapes for london, with all airport add ons for london, and Aerosoft London, you will get an OOM lol, specially with high settings, so every thing is compromise, but graphics wise no issue, it will load every texture you throw at it,

it is the 4Gb 32bit FSX limitation that gives that issue with all those addons and settings ramped up high.

 

My works computer for travel (need a new graphics card there) with only 512Mb RAM GPU, won't show all the textures, even with settings down low at edwards airforce base with a high textured aircraft, but is okay for photoshop needs.

This thread has some useful and informed information in it regarding VRAM and VAS etc.

http://forum.avsim.net/topic/373830-videomemoryoverride-does-it-really-work/

These threads are linked to in the above;

http://forum.avsim.net/topic/353625-why-is-a-3gb-graphics-card-not-good-for-fsx/

http://forum.avsim.net/topic/347089-issues-with-3gb-gtx580/

 

From what I can surmise in DX9 a shadow copy of the VRAM in use eats into the 4GB of VAS allocated for FSX, the more VRAM used the less VAS you have for FSX, the more VRAM you have available the higher the possibility of VAS starvation ond OOM errors. It looks like this only becomes an issue for people with *a lot* of add-on scenery, but it may be possible to resolve this with some system optimisation.

 

Obviously higher resolution monitors and multi-monitor setups will require more VRAM and so this will impact on available VAS, in one of the threads some testing was done to show going from 1920x1080 to 5996x1080 used about 280MB of VAS.

 

It would be good to hear from folks running FSX in DX9 who have cards of 3GB or more regarding any issues they have or haven't had, their monitor setup would also be useful info.

pfff, interesting stuff..... I could always try and if running into OOM's then limit it in the fsx.cfg? So still take the benefit of the titan but not all the 6gb. We must have a 64bit sim...  B)

 

anyone using a titan at the moment in heavy dense area's in fsx?

pfff, interesting stuff..... I could always try and if running into OOM's then limit it in the fsx.cfg? So still take the benefit of the titan but not all the 6gb. We must have a 64bit sim...  B)

 

anyone using a titan at the moment in heavy dense area's in fsx?

Sara Louise Capon's experience demonstrates the issue nicely, her 30" monitor and multiple scenery add-ons are using up a lot of VRAM and thus causing VAS starvation leading to her OOM errors. If you don't use that many scenery add-ons and stick with a 27" monitor you may never run into the problem.

 

I'm not sure from reading the threads that the setting that supposidly limits the VRAM used in FSX actually works, but if you did run into the problem it would be something to try. I think I remember somebody said that they managed to resolve their issues by removing the default FSX scenery for the areas that they had 3rd party scenery for, possibly FSX was loading both sets into VRAM?