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Rob Ainscough

VAS usage = 1.1 GB+?

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I'm a little puzzled on the VAS usage of the 777, I'm staying just below OOM 4GB but it's very close and if the weather gets rough I'll OOM.  I'm not complaining at all because I know how to make adjustments and stay below OOM.  But I am a little confused on the VAS usage, PMDG suggested around 700MB-800MB, but so far I'm at 1 GB to 1.1GB.

 

If I load up the default C172, I've got 1,486,408 free.  If I load up the PMDG 777 and wait a minute or so, I get 479,806 free.  I usually cycle the 4 standard views and do a 360 in the views to make sure I'm getting a full VAS load ... but what I've noticed is that after I've done my standard view cycle (in the 777) and wait about 1 minute VAS will suddenly drop by 500MB or so ... I do nothing, just sit and wait about 1 minute.  The only other time I've seen strange 500MB VAS consumption with other aircraft (including the default) is when I activate the GPS window (and closing the GPS windows does NOT free up the VAS) for the first time.

 

My testing was done at Kind County International (SEA), clear skies (FSX), no add-on airports enabled, with only scenery loaded is MSE WA 2.0 (all other scenery disabled), AI disable.  I'm puzzled at why I'm 400MB over what PMDG suggest is max VAS usage?  I know PMDG don't support DX10 Preview so it's understandable I may not get a response here, but what have other's noticed on VAS usage with PMDG?

 

Thanks, Rob.

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Indeed strange, we have a discussion going over at BAV, seems like the T7 has a more "individual" hit on the VAS than the NGX.

 

No scientific approach from my end but I landed at FSDT KORD after a 8 hour flight with UTX "world", FTXG, FSGlobal Ultimate "world" mesh and UK2000 Heathrow Xv2 enabled, VAS usage 2,6 Gb when I gated. I run FSGRW and Rex 1024 textures, and Kostas tweaks.

 

Apparently I have no problem but a fellow BAV pilots have serious OOM issues with similar settings. Common for the two of us that we have never had OOM with NGX. Further my colleague started with a clean cfg and ran it through Bojote, and smack, he was ok.

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I did a test of this at UK2000 EGLL with Orbx England and I noted about 250 mb or so more usage with the 777 than the NGX. I then disabled all of my other scenery except for a departing airport in which I used Sunsky Jet's KPHL, and the UTX features along the route as well as Orbx ENG. I rebooted the sim for each test to make sure I had all of the ram released as this can skew the results. I found that I nearly recouped the memory difference between the planes. Before, I didn't really think much of enabling all of my scenery but it's really true that you should only use what you need for that flight. It makes a sizeable difference.

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I to am a fellow BAV I am not getting OOM since I made a few adjustments but I to notice about 1gb extra on vas for 777 then the 747 or 737

 

I tend to be at 3.1 on ground at egll and stay about 3.2-3.6 in the air with Rex utx ftx vatsim and as2012

 

Very strange

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This is odd ... I loaded the 777, started her up, and did nothing for 2 hours.  My VAS progressively dropped from 809,288 down to 190,453 over the course of 2 hours.  Keep in mind I did nothing at all and no AI traffic, no view changes, no weather, didn't even try to taxi, nothing, just sat there reading a hard copy of the manuals.

 

I've disabled everything except my GFDevFSX.exe (GoFlight controls) and FSUIPC (DLL.XML and EXE.XML) -- deleted the FSUIPC.INI also, check UIAutomationCore.dll.

 

I'm baffled, what's happening to my VAS?

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Hehe, I wish I could recreate that with my FSL Concorde... Maybe I could get her above FL120 sometime :)

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Hi, I've also noticed that the house colours livery uses less resources then the add on liveries. I did the tutorial with the house livery ok using my standard settings. But on my first couple of attempts with the Delta livery I had OOMs at KJFK I have made adjustment now and I'm getting about 3.5 with the 777 along with Aivlasofts EFB on a 2nd monitor. And Delta livery.

Peebee

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I'm a little puzzled on the VAS usage of the 777, I'm staying just below OOM 4GB but it's very close and if the weather gets rough I'll OOM.  I'm not complaining at all because I know how to make adjustments and stay below OOM.  But I am a little confused on the VAS usage, PMDG suggested around 700MB-800MB, but so far I'm at 1 GB to 1.1GB.

 

If I load up the default C172, I've got 1,486,408 free.  If I load up the PMDG 777 and wait a minute or so, I get 479,806 free.  I usually cycle the 4 standard views and do a 360 in the views to make sure I'm getting a full VAS load ... but what I've noticed is that after I've done my standard view cycle (in the 777) and wait about 1 minute VAS will suddenly drop by 500MB or so ... I do nothing, just sit and wait about 1 minute.  The only other time I've seen strange 500MB VAS consumption with other aircraft (including the default) is when I activate the GPS window (and closing the GPS windows does NOT free up the VAS) for the first time.

 

My testing was done at Kind County International (SEA), clear skies (FSX), no add-on airports enabled, with only scenery loaded is MSE WA 2.0 (all other scenery disabled), AI disable.  I'm puzzled at why I'm 400MB over what PMDG suggest is max VAS usage?  I know PMDG don't support DX10 Preview so it's understandable I may not get a response here, but what have other's noticed on VAS usage with PMDG?

 

Thanks, Rob.

 

How are you measuring the VAS? The fact that you're talking about the amount "free" makes me think you're using some measurement other than the Process Explorer virtual size method in the manual... 

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Interesting. I run FSX on a Win7 64 system, with FTX Global textures, Ultimate Terrain and FSGRW weather, and (a real memory hog) FS Global Ultimate mesh.

 

I monitor free VAS remaining with FSUIPC. I'm surprised at the OP's low VAS even with the default 172.

 

On my system, the default 172 will typically give me 2.8 GB free VAS - maybe a bit less at a graphics intensive add-on airport.

 

The NGX will usually start out about 2.3 GB free VAS, perhaps dropping down to about 1.7GB free at the end of a long flight, after landing. I have never gotten even close to any less than 1.3 GB VAS remaining in any NGX flight, even in very heavy overcast conditions.

 

I did my first T7 flight yesterday from FSDT LAX to ImagineSim ATL, with FSGRW weather active for the whole flight. I started out with 1.8 GB, dropping down to 1.1 GB after landing.

 

My system WILL OOM if I'm not careful with one specific aircraft - the FSL Concorde-X. I cannot do a Concorde flight from EGLL to JFK unless I use the FSX default airports at either end. If I try to use my Heathrow Extreme, or FSDT JFK, I'll never make it... Even with default airports, it's not uncommon to see VAS down to 250MB on approach, with the FSUIPC low memory warning chime sounding constantly. So it's not like my system is "immune" from VAS exhaustion.

 

Not sure why some users are experiencing low VAS with the PMDG T7. Dropping down to the 500-600 MB free VAS point almost immediately after loading, when mine starts up with over 3 times that amount of free VAS, and does not spontaneously decrease once loaded, if I just sit parked in one spot.

 

One proviso - my FSX computer is used ONLY for FSX, and nothing else. I have no other software installed - no MS Office, no Adobe Reader, no Java, not even an email client. I have many unneeded Windows services disabled.

 

I do run FSX with terrain resolution and scenery complexity at maximum, and autogen 1 notch below max. Cloud draw is set at at 90 miles. Water at 2x Low. GPU is a GTX 660Ti with 2GB.

 

I run all AI, water and road traffic at zero.

 

 

How are you measuring the VAS? The fact that you're talking about the amount "free" makes me think you're using some measurement other than the Process Explorer virtual size method in the manual...

It's done using FSUIPC. It will display VAS remaining in the upper window bar (in windowed mode), or within the main FSX screen (for full-screen mode). Very easy to set up from within FSUIPC, and avoids the need to run Process Explorer concurrently with FSX. I wrote a post a few weeks ago on how to enable the FSUIPC memory monitor, will try to find the link. Does require registered FSUIPC.

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As part of my latest build and FSX priority memory usage, I log/"plot" VAS memory use vs LOD settings (with all other sliders/variables constant). I use FSDT's CYVR and Aerosoft's Anchorage X airports as the load. In preparation for the 777X I did VAS benchmarks on the NGX. I determined exactly and precisely the settings required to trip an OOM and the threshold I need to be at to maintain my flying environment without.

 

The 777X significantly surpasses the NGX and is most definitely harder on VAS than the NGX. IMHO the difference is not within the usual margin of error that was causally assumed from pre-release comments and marketing speak which indicated the 777x and the NGX would be comparable. It is why in fact, the many are seeing OOMs while comparing to the NGX.

 

I have made adjustments to my system to accommodate the 777X because it is such work of art. I have been a software developer for over 3 decades and I FULLY appreciate what PMDG have accomplished here and I just love the plane!! My approach is to make the aircraft a priority over other memory consumers.

 

I fully anticipate that in the natural progression of the products life cycle, service packs will find a way to optimize and provide tuning options for the users who either can't (know how) or won't (eye candy and traffic are their priorities - and that is OK!) take steps to relieve the OOM potential.

 

If PMDG say "Guys we have done everything and the 777X VAS footprint is required" then I will live with it but I have to believe that his is not the case.

 

Thanks PNDG for a crazy good aircraft which will only get better as time progresses.

 

Cheers!!!!!!!!!!!

 

 

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How are you measuring the VAS? The fact that you're talking about the amount "free" makes me think you're using some measurement other than the Process Explorer virtual size method in the manual...

1st, go into the FSUIPC.ini file, and insure the entry "OOMCheck" is set to "yes".

 

Open the FSUIPC setup screen. Go to the "logging" tab, and in one of the "specific value checks" enter the value 024C (first character is zero, not the letter"O".

 

Change the "type" for that value from S8 to S32.

 

Click on the checkboxes to display the value either at the upper window bar, or within the main FSX screen.

 

Now save and exit. Going forward, you will have a continuously-updated readout in-game of free VAS remaining.

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Today I became obsessed with this issue. I managed the tutorial flight with no problem at all with the add on sceneries in the manual. And then yesterday I decided to take it on it it's first flight from Heathrow to Dubai and what do I get on approach to Dubai? This much read about and never in my simming career seen OOM.

 

Tis true I have never ever seen this happen to my rig. Not once.

 

Of course I instantly downloaded process explorer and started messing about. I did this flight three more times today and OOM occurred on the first 2. Each flight had me winding down settings. On the third it happened but in a different way. I started to hear the mysterious bing of windows doing something in the background. I opened display settings and reduced more settings, though at this point it was looking ridiculous in there. I had already reduced the cloud resolution, AI  And now I axed even more of the Autogen. (for some reason if I take my autogen below dense I lose 5fps. Dont know why but do remember reading somewhere that with some setups this can happen)

 

With some more of those settings down the ping stopped and I carried on flying the approach. About 3 miles on final the pinging started again. Getting really miffed off by now I reopen the settings and just knock all buildings off and god only knows what else and finally get the bloody thing on the floor.

 

After this misery my fs looked poor to say the least and so I did more testing around this scenery. I found that moving the autogen sliders up and down did diddley squat to my VAS usage. Not really. Nor did injecting weather from my laptop to my fs rig with AS2012. The biggest user was UT2 Which was taking between 250 and 360.

 

I will be playing around with this more tomorrow as I absolutely hate not having everything running smooth and solid. I have always had a very smooth running fs with this rig and some very good looking stuff going on. 80% UT, HD clouds, Multi layered weather. All sliders mostly to the max accept autogen which has always been on dense, and water which is 2*Low. Very detailed airports and using heavy planes like the NGX and Blah Blah Blah as they say. 

 

I will start playing with the the thing again tomorrow where the autogen has more of an effect. And try another 6 hour flight somewhere, without so much going on on the arrival front. Dubai is a stunning beast and looks great if I just load up there and taxi, fly about. Stunning and smooth as silk. And I do mean I dont get a stutter there. Taxi about this place at a constant 25. It seems however, I just cant fly there from London or maybe even anywhere in the 6 hour or more bracket.

 

I must say I am gutted that my 777 rollout has be clouded by such a crappy FSX issue and I wish I had not become so completely absorbed in getting to the root of the matter. Once I find a problem I just have to understand it. I am also going to try this route with the NGX.

 

I am really not sure how I have avoided this OOM nightmare before now. And what's worse is it has you right at the end of the flight. It's like surviving the fall without a parachute only to land in a pond of crocodiles. .It is infuriating to know my machine is more than willing to cope with the scenery and settings I throw at it but is tripped up by shoddy memory management in the sim.

 

FSX has more holes than a collander and I worry about the future of our hobby. I mean with PMDG making such high fidelity aircraft like they have. How far can they go with such restraints?

 

Anyhow that's my little venting rant over

 

Regards to you all and good night.

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talking about the amount "free" makes me think you're using some measurement other than the Process Explorer virtual size method in the manual...

 

At first I used FSUIPC to report VAS usage (aka Free) since I can run full screen with it.  But to verify my results I used Process Explorer in with FSX in Window Mode, but the same VAS usage issue remained.

 

Also of note, when I activated the checklist, I lost about 400MB VAS, ouch ... seems like a big chunk of VAS for just a checklist process?

 

I'm puzzled, I've gone thru the process of disabling everything and removing all other variables ... I've left my GoFlight stuff active but that really should not affect VAS at all since it's a separate process/exe and I see it running as a separate process under Process Explorer.

 

Even disabled the COUTLI Add-On Manager (bglmanx.dll) since I wasn't currently using any of those airports and stayed with default FSX (SEA) airports.  I did leave the RAASPro DLL enabled since that installed with the 777.  Not sure what will happen if I disable RAASPro.dll, will the 777 still work?

 

Don't get me wrong, I love the 777, but I'm just trying to figure out where all my VAS is going when I'm just sitting at the Gate reading my manuals ;)  Also worth noting that I've done this same process (sitting at the gate) with the C172 (default FSX), RealAir Duke, Q-400 and the default 747 ... my VAS fluctuated a little (<100MB) over 2 hour period.  But the 777 will just consume all my VAS until it's gone -- I'm pretty sure this isn't "normal".

 

 

On my system, the default 172 will typically give me 2.8 GB free VAS - maybe a bit less at a graphics intensive add-on airport.

 

Want to be clear, I'm not concerned about free VAS, I do know how to free up more VAS.  My concern is that I'm sitting at the gate doing nothing for 2 hours and my VAS gets consumed until my system OOMs.  I can free up more VAS, but all that will do is extend how long I can sit at the gate doing nothing.  So what's happening to the VAS, why is it being consumed when I'm just sitting at the gate?  (remember, no weather, no AI, just me and the gate at a default FSX airport).

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Also of note, when I activated the checklist, I lost about 400MB VAS, ouch ... seems like a big chunk of VAS for just a checklist process?

 

I will definitely be checking this out in the morn.

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Definitely appears to be a memory leak somewhere on your system. Wish I could do a side-by-side comparison between your system and mine, but I'm no hardware expert, so not sure that would be any help.

 

 

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Definitely appears to be a memory leak somewhere

 

I'm not sure what it is Jim, but I don't seem to have the VAS consumption problem in all my other Aircraft ... seems to be specific to 777 or RAASPro that installs with 777.

 

I'll keep digging to see if I can find a source, but I've pretty much eliminated everything else.  I'm not kidding you gents when I say I just sit at a Gate for 2 hours with the 777 and all my VAS will eventually get consumed.

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I'm not sure what it is Jim, but I don't seem to have the VAS consumption problem in all my other Aircraft ... seems to be specific to 777 or RAASPro that installs with 777.

 

I'll keep digging to see if I can find a source, but I've pretty much eliminated everything else. I'm not kidding you gents when I say I just sit at a Gate for 2 hours with the 777 and all my VAS will eventually get consumed.

One possible difference between our respective installations - I didn't install the RAAS option...

 

Just curious - have you checked the disappearing memory at the gate problem with different panel states? Powered up vs. cold & dark? BTW, I have never loaded the default PMDG T7 livery. I installed the Delta livery with Ops Center immediately after installation, and all my flights have been in the Delta.

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Very interesting thread.

 

I have battled my OOM issues since I took my first flight with the T7 and have yet to complete a flight without OOM (I have done 7 legs now. Always EDDL-OMDB or the return leg, sceneries from Aerosoft and FlaTampa).

 

Today I took the time to measure VAS in more detail. I put the T7 on the active runway at OMDB at 11pm with real weather and saved the situation. I then made various changes to the sim config, the FSX.cfg and even my gfx driver and found the following, which can back up the experiences of the OP:

 

I have just under 1.2 Gig free with the T7 right after loading.

Same situation with the NGX I have 1.64 GB left.

Same situation with the LevelD 767 (with A. Folkers VC mod) I have nearly 2 GB free!

 

Back with the T7 I have then tried to figure out why I'm still getting OOM after reducing settings. Here is what I found:

 

Turning off UT2 I have 1.35 GB left.

Turning off all other sceneries including FSGloabal bought me less then 100mb extra. This trick will do its magic during cruise though.

Turning off car and boat traffic (was at 17% before), and reducing cloud draw distance, autogen to sparse and mesh to 19m yielded in less then 80 MB difference in Dubai!

Reducing screen resolution from 1440p to 1080p: 1.67GB free!

 

Conclusions:

 

On my system the T7 has a significantly (around 450MB more then the NGX and almost 800 MB more then the LDS 767!) higher VAS usage then what was stated by PMDG. People have used the analogy of "the straw that breaks the camels back" but on my machine the T7 is not just a "straw". It's a significant strain unfortunately.

 

Reducing almost every other setting and implementing all tips from the manual to combat OOMs saves me up to 250MB in this particular situation - no more. And that is whith all AI off, almost no autogen, and no other sceneries active.

 

The screen resolution has a significant impact on VAS usage. If I had a 1080p screen I would be unlikely to experience any OOMs, even with my highest (sensible) settings!

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I wanted to start a new thread, and i found this. Interesting, i have similar results in DX9, process Explorer used. Arround 400mb more then with NGX, tested in saved situations and without weather, AI traffic and all variables i could remember. I have some screenshots, maybe i'll upload some, later. 

With my settings, on realy "VAS heavy" airports i can't go over 2.800.000 in process explorer with NGX, but with 777 it goes up to 3.200.000. This is in tests, after full flight VAS is arround 300.000k higher. 

It's ok for me, i am able to do long haul flights with 777 with my settings, allmost everything is maxed out, but i have lowered TML to 1024(graphics is still excelent), and rest of important settings like before - lod radius = 4.5, REX clouds 1024 DXT optimized, all addon airports 1024 textures if installer asked, and things like this.

 

I came close to OOM just once, with 2048 textures enabled in fsx.CFG and 2048 textures of FSDT CYVR installed, after long haul flight. I changed both to 1024 and no more problems, i didn't saw anything above 3.500.000 since then. And i did that flight 2 more times, just to be sure.

 

777 uses more VAS, but it's manageable in my opinion. It will be good to have some options to configure texture quality, but i'm just fine with this. It's ok to be like this, 777 looks much better then NGX.

 

Some interesting findings during my testing yesterday: 

 

- every time i go to external view, VAS usage +100MB. Interesting is that similar thing happens in VC if i do 360° in the views, and if i go to external view after that - nothing happens.

 

 - If i uncheck "high resolution 3-D virtual cockpit" in FSX, VAS decreases by 100MB

 

 - If i uncheck Aircraft cast shadows on the ground, VAS decreases by 100 more MB

 

 - no effects after lowering scenery complexity from extremely dense to very dense(i did this without quitting FSX), autogen from very dense to dense and water effects from High 2X to low 2x. I tried more options, but i think this 2-3 was important. 

 

777 virtal cockpit looks great even with high resolution 3-D virtual cockpit unchecked, so here you have some tips to decrease VAS by 200, maybe 300MB if you don't use external view

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gate problem with different panel states?

 

No I haven't, I'll give that a try and see what happens to VAS.  I'll also disable RAASPro.

 

 

 

777 uses more VAS, but it's manageable in my opinion.

 

Hey folks, I must not be communicating well.  I know how to reduce VAS (lower LOD, lower textures, etc. etc.) - I've done 1-2 hour flights in the 777, that's not my concern.

 

My concern is why does all my VAS get depleted when I'm just siting at the Gate doing nothing (other than cycle views including overhead panels) for 2 hours?  This is my real question, this should not be happening (or should it) ... it doesn't happen with other aircraft, only the PMDG 777.  I bumped into this problem because I was reading the manual, going to the overhead panels and confirming with manual, etc. etc.  - basically learning the 777.  I wasn't flying, no taxi, no comms, no AI, no weather, just me the 777, the manuals, the overhead panels, the FMC, the checklist ... do this and all my VAS will eventually get consumed (in my case this took about 2 hours).

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My concern is why does all my VAS get depleted when I'm just siting at the Gate doing nothing (other than cycle views including overhead panels) for 2 hours?

 

Probably i didn't read carefully enough, i was happy to see that i am not the only one who tested this :) 

 

 

Cycling the view i get same effect like when i go to outside view - arround 100mb increased VAS usage instantly. If i go to outside view right after that, sometime i can see more 100MB.  And I've seen increase in VAS doing nothing, but i didn't tried to "do nothing" more then 15-20min.

 

i have actually responded more to this part from your first post: 

 

 

 


I'm puzzled at why I'm 400MB over what PMDG suggest is max VAS usage?  I know PMDG don't support DX10 Preview so it's understandable I may not get a response here, but what have other's noticed on VAS usage with PMDG?

 

I've seen approximately same value with DX9. Has anyone tested VAS usage with and without RAAS Pro? 

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More testing and some good news.  I disabled FSUIPC and I disabled RAASPro.  Moved to LOD 6.5 and Textures 1024.

 

VAS started with 2.4GB used, after 3 min I was at 2.8GB used (lots of view cycles), after 37 mins I was at 3.1 GB, after 2 hours I was at 3.1 GB ... VAS stabilized and wasn't being consumed.  Also loaded up the Checklist and it didn't affect VAS much < 20MB, went thru the checklist.  Also check panel states and even changed panel states, VAS still good.

 

So I've eliminated the 777 and GoFlight as potential source of my VAS consumption problem.  So, what's left is FSUIPC and RAASPro ... one of these two must be the leaker of memory ;)

 

Rob.

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So I've eliminated the 777 and GoFlight as potential source of my VAS consumption problem.  So, what's left is FSUIPC and RAASPro ... one of these two must be the leaker of memory ;)

 

Rob.

 

FSUIPC should be fine. It's virtually installed on everyones machine, if it had a major memory leak I'm sure we'd all know about it. 

 

I'd try to re-enable FSUIPC and see what happens.

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The 777X significantly surpasses the NGX and is most definitely harder on VAS than the NGX. IMHO the difference is not within the usual margin of error that was causally assumed from pre-release comments and marketing speak which indicated the 777x and the NGX would be comparable. It is why in fact, the many are seeing OOMs while comparing to the NGX.

 

Scott, this wasn't "marketing speak". I personally ran the tests that produced the figures we printed - I will show you screenshots if you want, but I hope you can trust me that it is what I saw and not some attempt to deceive anyone. I spent a lot of time writing that section of the manual.

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Some interesting findings during my testing yesterday: 

 

- every time i go to external view, VAS usage +100MB. Interesting is that similar thing happens in VC if i do 360° in the views, and if i go to external view after that - nothing happens.

 

 - no effects after lowering scenery complexity from extremely dense to very dense(i did this without quitting FSX), autogen from very dense to dense and water effects from High 2X to low 2x. I tried more options, but i think this 2-3 was important. 

 

These 2 observations actually makes sense if you think about it. The FSX gfx engine is not smart enough to not load an object texture if it is covered by another texture afaik. I.e. even while panning in the VC the engine will bring all scenery, weather, and AI textures back into memory even if those objects are not visible behind the cockpit walls.

 

Also lowering the scenery settings will not have an impact right away. Try measuring VAS with a particular setting before reducing that setting and restarting the sim. Now you'll see an improvement. I assume this is because FSX doesn't free memory well.

 

 

Scott, this wasn't "marketing speak". I personally ran the tests that produced the figures we printed - I will show you screenshots if you want, but I hope you can trust me that it is what I saw and not some attempt to deceive anyone. I spent a lot of time writing that section of the manual.

 

 

 

Hi Ryan. Thanks heaps for joining the discussion!

 

First of all: I don't doubt for a second that the VAS figures you and others have released are indeed what you are measuring on your system. Also: Full kudos for the manual - it's very written indeed and comprehensively at that. 

 

The interesting question to me is why some of us get so much higher VAS usage then what was measured by you. My theory on that, based on some testing of my own (see my post above) is that these discrepancies could be due to differences in screen resolution.

 

I'm running at 1440p, and get 450MB less VAS then with the NGX (fresh install of both products - no changes made to the aircraft specific settings), and almost 800 MB less then with the LevelD 767 (with Andre Folkers VC mod). Note that the VAS difference between the LDS and the T7 is as big as what PMDG state the T7 will consume in total. Clearly that is not the case on my system for some reason.

 

So my question to you is this: What screen resolution did you use when you made your measurements?

 

Thank you!

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