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[IDV #KUJ-685967]: video ram system ram ??

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  • Subject: [IDV #KUJ-685967]: video ram system ram ??
  • Date: Mon, 04 Jan 2010 10:19:51 -0700
Hi Ian-

> Thanks,
> . . . how do I know if I am running a 64 bit version?

It will depend on what version of Windows you are running (e.g. XP, Vista).
See the instructions at:

http://support.microsoft.com/kb/827218

Don 

> Unidata IDV Support wrote:
> > Hi Ian-
> >
> > I'm just following up on this.
> >
> > The Intel graphics chip seems to be prone to this problem.  If you are 
> > running a 64 bit version of Windows, try using the 64-bit version of the 
> > IDV and see if you up the memory above 1Gb.
> >
> > Don Murray
> >
> >
> >> Unidata IDV Support wrote:
> >>
> >>> Hi Ian-
> >>>
> >>>
> >>>
> >>>> I am following up on my question.  I look forward to your response.
> >>>>
> >>>>
> >>> Sorry for the delay in responding.
> >>>
> >>>
> >> No worries
> >>
> >>>> I have modified the runIDV.bat file to allow for more memory usage.
> >>>> The computer has over 3.4 gig of RAM
> >>>> The video card has 1024 meg of RAM.
> >>>> I have ensured all of the drivers on the video card are up to date and
> >>>> we are running the latest version of java.
> >>>>
> >>>> IDV displays information fine when memory usage is set to 512.meg
> >>>> When I go up over 958 meg, the map display stops working properly.  (the
> >>>> default boundaries of coastlines are not displayed and I get a black
> >>>> screen)
> >>>> Am I limited by the video card RAM?
> >>>>
> >>>>
> >>> For the 32-bit version of Windows, the theoretical limit is 1.5 Gb that 
> >>> can be used by Java. On some systems, there seems to be a link between 
> >>> the system RAM and the video RAM so that moving above 1 Gb causes the 
> >>> problems you see.  We do not have a solution for this at this time.  What 
> >>> type of graphics card is this?
> >>>
> >>>
> >> Hmmm, I do not know much about hardware, but the display settings under
> >> Control Panel say Mobile Intel 4 Series Express Chipset Family . . .
> >> does that help?
> >>
> >>>> Furthermore, loading derived quantities like 1000-500 mb thickness takes
> >>>> a tremendous amount of time.  Is there something I can do to speed that 
> >>>> up?
> >>>>
> >>>>
> >>> In the 2.7u2 version of IDV, to do the thickness it would have to 
> >>> download all levels of the geopotential height, then slice and do the 
> >>> difference.  In the IDV nightly build (2.8a1), it now only downloads the 
> >>> 1000 and 500 mb levels and does the difference.  However, if you are 
> >>> using a high resolution grid, it will still take some time to download.  
> >>> You could reduce the resolution and/or spatial extent of the grid to 
> >>> speed up the download.
> >>>
> >>> Please note that the nightly builds come with a "big-boy" caveat, 
> >>> especially ones labeled with an "a" (alpha).  At any point, it may have 
> >>> some instability issues, but in general, we try to make sure that it 
> >>> performs well.
> >>>
> >>>
> >> Thanks! . . . I'll explore this
> >>
> >>> Don Murray
> >>>
> >>> Ticket Details
> >>> ===================
> >>> Ticket ID: KUJ-685967
> >>> Department: Support IDV
> >>> Priority: Normal
> >>> Status: Open
> >>>
> >>>
> >>>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: KUJ-685967
> > Department: Support IDV
> > Priority: Critical
> > Status: Closed
> >
> >
> 
> 


Ticket Details
===================
Ticket ID: KUJ-685967
Department: Support IDV
Priority: Critical
Status: Open