Simviation Forum - Out of memory problem running FSX

Sep 3^rd, 2009 at 11:31am

FRASSE226 Offline
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Fly FS

Posts: 31

Hi,

I have edit boot.ini as NickN suggested in Setting up FSX and how to fix it (/3GB/userva=2560) but I still have problem.

It happens when I switch screen for a add-on that are running on the same computer as FSX, I use UltraMon with hot keys.

My question are, what number should I try ?

Par

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Reply #1 - Sep 3^rd, 2009 at 4:00pm

jime59 Offline
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Need to see your system specs.

It might be due to your GPU(Graphics card or on-board). Wink

The mind is like a parachute...it only works when it's open.

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Reply #2 - Sep 3^rd, 2009 at 4:11pm

jime59 Offline
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By the way, Welcome to SimV.

The mind is like a parachute...it only works when it's open.

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Reply #3 - Sep 4^th, 2009 at 1:36am

FRASSE226 Offline
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Fly FS

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jime59 wrote on Sep 3^rd, 2009 at 4:00pm:

Need to see your system specs.

It might be due to your GPU(Graphics card or on-board). Wink

Hi,

I have FSX Delux and FSX accelerator install and here are my spec. from Belarc.

Windows XP Home Edition Service Pack 3 (build 2600)

2,20 gigahertz AMD Athlon 64
256 kilobyte primary memory cache
2048 kilobyte secondary memory cache
64-bit ready
Not hyper-threaded

Board: MSI AMETHYST-M 1.0
Bus Clock: 200 megahertz
BIOS: Phoenix Technologies, LTD 3.47 03/03/2006

3328 Megabytes Usable Installed Memory

c: (NTFS on drive 0) 1000,19 GB 785,87 GB free
d: (NTFS on drive 1) 293,59 GB 129,71 GB free
e: (NTFS on drive 6) 160,04 GB 104,51 GB free

NVIDIA GeForce 9600 GT [Display adapter]
Samsung S/M 1100p+ [Monitor] (19,7"vis, s/n H3NRB02269, november 2001)
Standardbildskärm [Monitor]

Hope you cane tell me now what to do.

Par

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Reply #4 - Sep 4^th, 2009 at 2:21pm

jime59 Offline
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Take a look at this and see if it sheds a little light on the subject.

http://blogs.msdn.com/ptaylor/archive/2007/06/15/fsx-and-win32-process-address-s...

The mind is like a parachute...it only works when it's open.

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Reply #5 - Sep 9^th, 2009 at 2:04pm

FRASSE226 Offline
Colonel
Fly FS

Posts: 31

Hi ,

Thank's for the link, but it to advance for me (LOL)
Anyway, I found this info in a other forum that I think is a good info how to set userva.

---------------
What's your graphics card memory? I assume your Windows XP is the 32bit version. For a 64bit version the rest of the post is of no use, since has no the Virtual Address practical constraints of the 32 bit's.

As a rule of thumb I've found somewhere a formula to calculate the memory to be reserved for user VAS (Virtual Address Space):

App_VAS (/userva param) = 4096 - 768 - <graphics_card_memory_size> = 3328 - <graphics_card_memory_size>

The reasoning after this formula is as follows:
- At least 768 MB should be reserved for the kernel code and data.
- PCI(express) graphics cards map their memory onto the System VAS
- The rest until 4096MB can be reserved for user mode processes (applications)

That gives us for:
- 256MB Graphics cards -> /userva=3072 (ie, 3GB)
- 512MB -> /userva=2816
- 768MB -> /userva=2560
- 1024MB -> /userva=2304

------------
Hope you find it usefull.

Take Care
Par

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Reply #6 - Sep 9^th, 2009 at 3:05pm

NickN Offline
Colonel
FSX runs fine... the problem
is you or your system

Posts: 6317

That information is correct but the numbers presented are not exact.. they are calculated based on subtracting the video memory amout from the base value specified for address space... but those values, although ok as a rule of thumb, are to always required to be that low.

If you read what I said about tuning that value in the FSX tuning thread

http://www.simforums.com/forums/forum_posts.asp?TID=29041

you will find I said if OOM's still occur, to DROP the value by 64 until the OOMs cease which is basically the same information as above, except my method tunes it 'exactly'

If it works, leave it.. if you wish to tune it to the exact value, go back to 2560 and start by reducing that value by lots of 64 until the OOMs stop.

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Reply #7 - Sep 9^th, 2009 at 7:51pm

JBaymore Offline
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Good to see you having a minute to post again Nick. Thanks.

best,

...............john

Intel i7 960 quad 3.2G LGA 1366, Asus P6X58D Premium, 750W Corsair, 6 gig 1600 DDR3, Spinpoint 1TB 7200 HD, Caviar 500G 7200 HD, GTX275 1280M, Logitec Z640, Win7 Pro 64b, CH Products yoke, pedals + throttle quad, simpit

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Reply #8 - Sep 11^th, 2009 at 3:12am

FRASSE226 Offline
Colonel
Fly FS

Posts: 31

NickN wrote on Sep 9^th, 2009 at 3:05pm:

That information is correct but the numbers presented are not exact.. they are calculated based on subtracting the video memory amout from the base value specified for address space... but those values, although ok as a rule of thumb, are to always required to be that low.

If you read what I said about tuning that value in the FSX tuning thread

http://www.simforums.com/forums/forum_posts.asp?TID=29041

you will find I said if OOM's still occur, to DROP the value by 64 until the OOMs cease which is basically the same information as above, except my method tunes it 'exactly'

If it works, leave it.. if you wish to tune it to the exact value, go back to 2560 and start by reducing that value by lots of 64 until the OOMs stop.

Hi NickN,

Thank's for the info, my problem are not only the OOM it is also my understanding English the right way.

As fare as it has turn out now I do not have any pproblem with OOM, so I keep it as long as it works.

Par

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Reply #9 - Sep 11^th, 2009 at 2:00pm

NickN Offline
Colonel
FSX runs fine... the problem
is you or your system

Posts: 6317

no problem Par

As I said, what was posted is OK to use and it will do the job. The person that posted it does know what they are talking about.

The values are SUBTRACTED and not ADDED to the USERVA edit based on increased PCIe video memory

good luck

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Reply #10 - Sep 11^th, 2009 at 2:01pm

NickN Offline
Colonel
FSX runs fine... the problem
is you or your system

Posts: 6317

JBaymore wrote on Sep 9^th, 2009 at 7:51pm:

Good to see you having a minute to post again Nick. Thanks.

best,

...............john

Just hit and runs... still busy as heck on GEX EU but we are coming up on release soon at which point I will be taking a very long and well needed vacation

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