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I believe that it is up to 4GB *per* 32 bit application instance (i.e. 2 to the power of 32 bytes).
Further, I believe that 64 bit applications can use pretty much unlimited memory (i.e. up to 2 to the power of 64 bytes, which is more than you'll ever fit on a board).
e.g. assuming 16GB machine,
1st instance of 32 bit AB gets up to 4GB
2nd instance of 32 bit AB gets up to 4GB
64 bit Excel gets up to total memory (16GB)
Mike
--- In amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" <zoopfree@xxx> wrote:
>
> Thanks.
>
> If I run some simultaneous apps (AmiBroker, TWS, Firefox, email, Excel, other possible trading apps) will memory over 4GB be of any practical benefit? Or is 4GB the practical useful max on 64-bit Vista?
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@> wrote:
> >
> > Based on Tomasz's reply to an earlier thread, 32 bit AmiBroker running on 64 bit OS will use up to 4GB RAM.
> >
> > http://finance.groups.yahoo.com/group/amibroker/message/135524
> >
> > However, if your particular backtest does not require that much memory, the extra RAM will not get used and thus be of limited value.
> >
> > Mike
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, dingo <waledingo@> wrote:
> > >
> > > Yes, they seem to have 4 processors and with hyperthreading you get 8 .
> > >
> > > BTW - i've seen some posts here that claim they are running 32 bit AB on 64
> > > bit op system. You might look into that - it would allow you to get a bit
> > > bigger machine for the future.
> > >
> > > Also the SSD would be overkill imho - since AB cache's most of the data in
> > > memory.
> > >
> > > d
> > >
> > > On Wed, Mar 11, 2009 at 12:46 PM, ozzyapeman <zoopfree@> wrote:
> > >
> > > > Thanks. I was looking into i7 based-PCs. But aren't all i7's quad-cores to
> > > > begin with? And apparently the OS sees an i7 as 8-core due to the way it's
> > > > designed.
> > > >
> > > > Dell seems to have a good deal on i7 XPS desktops at 2.93 Ghz
> > > >
> > > >
> > > > --- In amibroker@xxxxxxxxxxxxxxx, dingo <waledingo@> wrote:
> > > > >
> > > > > Intel dual core i7 with fast clock - AB only uses 1 core. 3gig mem. Intel
> > > > > SLC flash (if you've got the money otherwise WD Raptor). Medium video
> > > > card.
> > > > >
> > > > >
> > > > > d
> > > > >
> > > > > On Wed, Mar 11, 2009 at 12:57 AM, ozzyapeman <zoopfree@> wrote:
> > > > >
> > > > > > I should add that I need to run exhaustive optimizations, as opposed to
> > > > > > CMAE or using Fred's IO, as my variables are discontinuous - not
> > > > traditional
> > > > > > indicator-type variables.
> > > > > >
> > > > > > In my parallel dream life, I run AB Ultra Professional 7.0 on 8 state
> > > > of
> > > > > > the art graphics cards, with thousands of processors, 500,000 times
> > > > faster
> > > > > > than good old AB 5.24.
> > > > > >
> > > > > > But I digress. ;-)
> > > > > >
> > > > > > In the real world, what is the best I can do?
> > > > > >
> > > > > >
> > > > > > --- In amibroker@xxxxxxxxxxxxxxx, "ozzyapeman" <zoopfree@> wrote:
> > > > > > >
> > > > > > > Now that I am just about trading full time, my main PC has become a
> > > > > > dedicated trading computer. That only leaves me with a clunky second PC
> > > > > > (6-years old) for doing offline optimizing. And it's waaay too slow.
> > > > > > >
> > > > > > > So I am in the market for a new PC, and want to get something
> > > > powerful,
> > > > > > but don't want to overpay for stuff that won't be used. For example,
> > > > 8GB of
> > > > > > RAM sounds great, but if WinXP only uses 4GB (or 3?) then I imagine the
> > > > > > other 4 GB just goes to waste?
> > > > > > >
> > > > > > > If I plan to use this PC mainly for offline optimizing and
> > > > backtesting,
> > > > > > what are the recommended specs? I want as much speed as I can possibly
> > > > get.
> > > > > > My optimizations tend to be humongous, taking days on a quad core.
> > > > > > >
> > > > > > > Any hardware gurus please feel free to chime in:
> > > > > > >
> > > > > > > - RAM?
> > > > > > > - Quad-core vs Eight-core?
> > > > > > > - OS?
> > > > > > > - HD type (flash vs mechanical)?
> > > > > > > - any other hardware/software suggestions for increasing speed?
> > > > > > >
> > > > > > > Thanks!
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > ------------------------------------
> > > > > >
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> > > >
> > > > ------------------------------------
> > > >
> > > > **** IMPORTANT PLEASE READ ****
> > > > This group is for the discussion between users only.
> > > > This is *NOT* technical support channel.
> > > >
> > > > TO GET TECHNICAL SUPPORT send an e-mail directly to
> > > > SUPPORT {at} amibroker.com
> > > >
> > > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
> > > > http://www.amibroker.com/feedback/
> > > > (submissions sent via other channels won't be considered)
> > > >
> > > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> > > > http://www.amibroker.com/devlog/
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
------------------------------------
**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
TO GET TECHNICAL SUPPORT send an e-mail directly to
SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
(submissions sent via other channels won't be considered)
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
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