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Windows 7: Physical Address Extension [{ID}] Where and What?

22 Sep 2013   #11
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64

isepiq I personally don't recommend doing anything with address extensions let along using a torrent as a reference to make changes.
Have a nice day.

Post # 7

(Got this from µTorrent log on my system??? Have no idea if this is what the ID should be. If it is, I can temporarily run µTorrent on the neighbors computer to get their ID, if it is the correct NFO???)

My System SpecsSystem Spec
26 Sep 2013   #12

Windows 7 Ultimate 64bit

Ok, the problem was that this HP Computer came with 4GB of ram installed from the Factory, and only an x32 (32 bit) system, which did not make any sense to me. It is only showing a little over 2 GB of ram and I was trying to make it show closer to 3 or 4 GB of Ram. I finally got the id thing:


Windows Boot Manager
identifier {bootmgr}
device partition=\Device\HarddiskVolume1
description Windows Boot Manager
locale en-US
inherit {globalsettings}
default {current}
resumeobject {11126ec2-af9a-11e2-ab6e-9db344db0084}
displayorder {current}
toolsdisplayorder {memdiag}
timeout 30

Come to find out that if you do not put an id, it just sets PAE for the current system, duh for me.....ugh.

Any ways, is PAE going to help this HP computer see more than 2 GB of Memory??? Thanks for all of your help.

My System SpecsSystem Spec
26 Sep 2013   #13

Windows 10 Pro (x64)

Quote   Quote: Originally Posted by isepiq View Post
Any ways, is PAE going to help this HP computer see more than 2 GB of Memory??? Thanks for all of your help.

No. The missing address space is used by the hardware. You cannot get the full use of it for RAM.
My System SpecsSystem Spec

26 Sep 2013   #14

Windows 7 Pro 64 bit

PAE will not help with this.

In a 32 bit OS a substantial portion of the physical address space is consumed by memory mapped hardware devices. Typically this will leave about 3.25 accessible RAM, sometimes less, sometimes much less. This will be further reduced if RAM is shared with the video system. Note that this is address space that is consumed, not RAM itself. Almost all of RAM could be accessible if we had adequate address space to put it.

Most modern processors have a 36 bit address bus so could theoretically could access up to 64 GB RAM so address space isn't a problem. Most modern systems have an option in the BIOS to move RAM that could not otherwise be accessed to addresses above 4 GB. PAE was designed to allow access to such addresses so it would appear we have a solution to the problem. Almost all of the 4 GB RAM could be accessed.

The above mentioned method actually works in 32 bit server operating systems and it did in XP up till about SP1 or SP2. The problem was that Microsoft discovered that many device drivers behaved very badly in such an environment. I believe that audio drivers were a particular problem. Servers tend to have very basic audio, if it is supported at all. So it was decided that this memory remapping feature would NOT be supported in client versions of Windows. Any RAM with addresses above 4 GB is simply ignored.

So the bottom line is that PAE does nothing useful in client versions of Windows. It is useful in server systems.
My System SpecsSystem Spec
27 Sep 2013   #15

Windows 7 Ultimate 64bit

Thank you. I am surmising that HP had one of those older OS's installed when it was new and that is probably why they had 4GB of Ram. It has W7 Ult now, so I guess my neighbor is just out of luck on that.... I am pretty sure they would not want to go back to XP now that they are used to 7
My System SpecsSystem Spec

 Physical Address Extension [{ID}] Where and What?

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