I'm sorry you are experiencing these probs...but I positively know that this
is the solution to your problem... I've done investigation work into this
problem.
When I built this computer from scratch, the motherboard I installed has 4
bays fitted to it which means that each bay can hold up to a maximum of 4 GB
of DDR2 ram, and at the moment, i'm only using just 1 GB but if I installed
4GB ram, and installed Windows Vista H.Premium 32 BIT, Vista would only
report that it can only see 3GB because that's the top memory spec that
microsoft built vista for, (this applies to all versions), if I wanted vista
to report the full amount of memory, even if 6 GB was installed, or 10 GB
installed, it would make much better thinking to put the 64 bit on first and
cover everything, than rather have the 32 bit to cover my first 3 GB, and
upgrade later.
Secondly, if you click on this web site address (or you can use the "Cut &
Paste" option), this site lists how much memory vista can handle per edition
following an upgrade from XP.
Version Limit in 32-bit Windows Limit in
64-bit Windows
Windows Vista Ultimate 4 GB 128 GB
Windows Vista Enterprise 4 GB 128 GB
Windows Vista Business 4 GB 128 GB
Windows Vista Home Premium 4 GB 16 GB
Windows Vista Home Basic 4 GB 8 GB
Windows Vista Starter 1 GB Not
applicable
These Websites, - Explains Everything about vista 64 bit versions and what
they will and will not accept.
1:
http://www.start64.com/index.php?opt...tpage&Itemid=1
2:
http://www.iexbeta.com/wiki/index.ph...atibility_List
3:
http://www.iexbeta.com/wiki/index.ph...atibility_List
" wrote:
Hello,
Just read the longest post on this issue with no result so let try
again.
If i have 4 gig, only 3 shows, 750mb is reservered for the system.
Doesn't that seem a little stupid? If i have 3 gig of ram, 3 gig
shows in vista, here it has not needed to reserve 750mb. So why does
the first scenario need 750 for the system, and the second does not?
This would mean that the second does not have any ram for its system,
same devices and os. I would have thought that both situations would
result in having 750 stripped for the system. My old box, XP 256 mb
ram all that was avaliable and did not need dedicated system ram.
Does anyone have a straight answer for this? Yes i could run 64 bit
os, but at the moment i want to get 4 gig running in my 32 bit
environment.
I tried the following switches with no change.
1. Reboot Vista to safe mode with command line
2. Run the command : bcdedit /set PAE ForceEnable
3. Run bcdedit again to verify the switch is added
4. Reboot the system and check whether the problem is fixed
This is from the original post:
http://groups.google.com.au/group/mi...dbc2867738d289
"LOL, I was scratching my head over that one too. By definition, a 32-
bit CPU
can directly address up to 4GB of memory. But apparently nearly 1GB of
that
is reserved for devices. So the most you can possibly see is 3.12GB in
a
32-bit system. The way I read it, there is no way around it, no "fix"
if
you're using a 32-bit version of Vista.
To see any more than 3.12 GB you have to be using a 64-bit version of
Vista
plus meet all those other requirements (64-bit CPU instruction set,
chipset
with 8GB address space, BIOS that supports memory remapping). That's
the way
I read it anyway.
I think the DEP/ PAE thing is a whole different (but related) issue. "