Physical Address Extension (PAE) does not work on vista as expected.

Well, my goal was not to frustrate you more or make you upset with me.

My first post simply pointed out that there may be a difference in reported
memory depending on where you look: e.g. System Property may report 4GB, but
task manager may report less.
I didn't refer to BCEDIT until you replied with: "I suppose I should have
asked "what are the steps required for using PAE to actually remap
addressing to the extended areas?"

To that, I sent you to the instruction manual.
Have a nice day.

"Sarah White" <kuzetsa@xxxxxx> wrote in message
news:eUJUIToyIHA.2340@xxxxxx

Only server OS systems can support more then 4GB of memory with a 32bit OS
since the use memory mapping to provide 4GB of logical memory to different
running process which map to different physical memory addresses.
Vista 32 bit like most if not all personnel computer Boss can not address
more then 4GB since it does not use memory mapping.
"Sarah White" <kuzetsa@xxxxxx> wrote in message
news:eUJUIToyIHA.2340@xxxxxx

Let's try one more time, but I'll just give instructions:

From elevated cmd prompt:
bcdedit /set PAE forceenable
Reboot

The reboot is required before proceeding.
Most likely, not all RAM is being reported.
That's because on 32-bit OS, DEP is required when PAE is running. (Even
if not supported.)
DEP may cause other problems.

From elevated cmd prompt:
bcdedit /set nx AlwaysOff
bcdedit /set PAE forceenable
Reboot

It is proven that PAE and Creative sound cards won't work together.
There may be other configurations that don't work.

To turn off:
From elevated cmd prompt:
bcedit /set nx AlwaysOn
bcedit /set PAE default
Reboot

If it still doesn't work, it's not supported by your machine.



"Sarah White" <kuzetsa@xxxxxx> wrote in message
news:%23zt6h7ayIHA.4848@xxxxxx

I upgraded WinXP Pro x64 partition to vista because... let me think...
Sure, 4GB was nice, but practically ZERO driver support for XP Pro x64

As for your comment about "Only server OS systems..."

I suppose it is known that the limit is 4gb on XP (why though?)
-- http://msdn.microsoft.com/en-us/library/ms791485.aspx

The 4GB limit is really just OS developers being lazy (or greedy?)
Truly, PAE / NUMA / 4GB limit is far more reliable on linux (lol)
.... What do I know; I'm just a developer that has vista for gaming.

My opinion, greed -- the 64 bit OS is unnecessary to access 4GB or more
of memory, but then you are EMULATING 32bit mode for gaming and other
apps. My very first thought was to check vista's "help and support" ...

1) go to your start menu and open "help and support" in windows vista.
2) type "PAE" in the search
3) the only result is "Physical address expansion (PAE) (definition)"

They even admit / explain it's "up to 64 GB" but didn't mention they
will deny you access to your ram / hold out and sell you "upgraded"
64bit version of windows to make an extra buck. Just my $0.02

JW wrote: