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Windows 7: Hardware reserved Memory?

07 Dec 2011   #11
Corazon

Windows 7 Professional SP1 32-bit
 
 

It does make you wonder why Microsoft doesn't just enable the extra memory in 32-bit Windows for special usages - a default RAM disk, supplemental pagefile.sys for the current session or just a place to use for Superfetch/Readyboost caching instead of regular main memory.

Then again, with the ongoing 64-bit crusade this is becoming less and less relevant anyway.

Interesting point in case: I actually use a RAM disk on my laptop with 4GB RAM in the invisible memory. Windows only sees 2.75GB because the onboard video takes a 256MB chunk from 2.75GB to 3GB for itself. Only a few MB above 3GB is actually wasted to map PCI address space, so I'm able to use nearly a full gigabyte for the RAM disk.

(I've since discovered that the laptop's BIOS maps the fourth GB of RAM to an address space from 4096MB to 5120MB, leaving a 1GB hole between 3072MB and 4096MB. Crazy!)

I've arranged for pagefile.sys to live exclusively in that RAM disk so I don't need one on the HD, saving me extra space - and in terms of security, it's the ultimate solution since the pagefile is zapped into nothingness with every reboot.


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07 Dec 2011   #12
bala2289

windows 7 ultimate x32
 
 

Thanks guys... I dont want to waste my 750 mb unused so im going to install Gavotte Ramdisk...
One more doubt guys.. my video card has 1 gb of memory and even if the hardware reserved memory is added to it. It should be some 1700 mb but my dxdiag says it has 2417 mb, where did the remaining memory come from and will it be utilized entirely by the applications?


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07 Dec 2011   #13
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

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07 Dec 2011   #14
Corazon

Windows 7 Professional SP1 32-bit
 
 

The card doesn't map its memory into the PCI address space all at once. The claim that you'll lose whatever onboard RAM the card has is a myth.

It does map its onboard memory through a much smaller window to transfer data to and from the CPU/system RAM. Portions of the videocard's onboard memory are dynamically mapped in and out as needed through that window.

As for the 2417MB shown in DXDiag, that's the amount of shared system memory your card can use if its own onboard memory fills up completely (1GB onboard plus ~1417MB system RAM), but Windows has the last word on that. Don't worry, it doesn't mean the card actually keeps 1417MB of your RAM from being usable.
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07 Dec 2011   #15
bala2289

windows 7 ultimate x32
 
 

Thanks a lot stormy,murmatron and corazon..
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07 Dec 2011   #16
bala2289

windows 7 ultimate x32
 
 

lol Ramdisk uses 16 mb of missing memory... what happen to the rest??

Guys sorry for asking so dumb questions..
I notice that the pagefile's used size changes from time to time even when a lot of the system's ram is free, y this that?
I thought that the page file will be used when the ram runs out.. So y use it when u have enough ram?


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Hardware reserved Memory?-untitled.png  
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07 Dec 2011   #17
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Why don't you just leave it as is. There is no reasonable way to make use of the 750MBs with a x86 system. If you want to use that total RAM, you will have to get a x64 system. If you keep playing around with it, you will just ruin your system.
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07 Dec 2011   #18
bala2289

windows 7 ultimate x32
 
 

Quote   Quote: Originally Posted by whs View Post
Why don't you just leave it as is. There is no reasonable way to make use of the 750MBs with a x86 system. If you want to use that total RAM, you will have to get a x64 system. If you keep playing around with it, you will just ruin your system.
My system is x64 capable but noway i'm going to reinstall all the applications to use 64 bit os.
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07 Dec 2011   #19
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote:
My system is x64 capable
That does not mean anything if you are running a 32bit OS. And if you do not want to install a 64bit system, you will have to live with the 3.25GBs of used RAM. In daily life there is not really such a difference to using 4GBs - you would probably not notice any real difference.

Have a look in Resource Monitor > Memory tab. The colored bar will tell you how much RAM is being used. And remember, the dark blue portion is for caching only and is "available" RAM.
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07 Dec 2011   #20
Maguscreed

Microsoft Community Contributor Award Recipient

Windows 7 x64
 
 

Why is this thread still going on?
I mean seriously it was solved in the first two responses.
The rest of this really seems like meaningless bickering to me.
I'm sorry guys but this is really unlike most of you.
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