vista recongize 4 gigs system memory

Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo

geo85706 wrote:

Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't.

You have to correct that in your BIOS. How to do it will be in your owner's manual. Vista sees all the RAM the BIOS lets it see.

"John Boy" wrote in message

geo85706 wrote: Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't.
You have to correct that in your BIOS. How to do it will be in your owner's manual. Vista sees all the RAM the BIOS lets it see.

He said his BIOS DOES see it

The BIOS will certainly see it but will usually keep some for its own purposes and not report it as available to Windows unless you find and change some settings which are often not available unless you have a motherboard aimed at overclockers.
If available, change MTRR from its default of Continuous to Discrete. The Memory Hole setting can also affect the memory reported to Windows.
"Tom Scales" wrote in message

"John Boy" wrote in message geo85706 wrote: Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't.
You have to correct that in your BIOS. How to do it will be in your owner's manual. Vista sees all the RAM the BIOS lets it see.
He said his BIOS DOES see it

Tom Scales wrote:

"John Boy" wrote in message geo85706 wrote: Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. You have to correct that in your BIOS. How to do it will be in your owner's manual. Vista sees all the RAM the BIOS lets it see.
He said his BIOS DOES see it

On my Asus board in the BIOS there is "DRAM Over 4G Remapping" that must be enabled for the OS to see most of the 4G. Even with it enable I still lose a little bit and don't see the full 4G. There is a memory "hole" by design. Enabling the 4G Remapping moves it around the "hole" so the OS can see it.

Hello, I was just about to post a question on the forum is see if 32-bit vista had overcome this missing memory problem when I spotted this post. I have 4G memory and running xp pro , only 3G was available. Using xp pro 64-bit I could see the full 4G of memory. It turns out that XP and ( VISTA 32-bit as well?) both use address's out of the 4G memory range to address hardware devices. Each hardware device you have means less addressable RAM. So I guess the answer is yes, VISTA has the same problem.... looks like I am going to stay with 64-bit then.
"John Boy" wrote:

Tom Scales wrote: "John Boy" wrote in message geo85706 wrote: Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. You have to correct that in your BIOS. How to do it will be in your owner's manual. Vista sees all the RAM the BIOS lets it see.
He said his BIOS DOES see it

On my Asus board in the BIOS there is "DRAM Over 4G Remapping" that must be enabled for the OS to see most of the 4G. Even with it enable I still lose a little bit and don't see the full 4G. There is a memory "hole" by design. Enabling the 4G Remapping moves it around the "hole" so the OS can see it.

"Dominic Payer" wrote in message

The BIOS will certainly see it but will usually keep some for its own purposes and not report it as available to Windows unless you find and change some settings which are often not available unless you have a motherboard aimed at overclockers.
If available, change MTRR from its default of Continuous to Discrete. The Memory Hole setting can also affect the memory reported to Windows.
"Tom Scales" wrote in message
"John Boy" wrote in message geo85706 wrote: Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't.

From my understanding if you install 4 GIG of RAM it has to be below PC3200. I have an Asus K8V SLI NForce Deluxe and according to the manual if I can only install 2gig of DDR400, but anything below can be installed up 4gig which is the max. Consult you manual or Asus website on memory configuration.

You have to correct that in your BIOS. How to do it will be in your owner's manual. Vista sees all the RAM the BIOS lets it see.
He said his BIOS DOES see it

From my understanding if you install 4 GIG of RAM it has to be below PC3200. I have an Asus K8V SLI NForce Deluxe and according to the manual if I can only install 2gig of DDR400, but anything below can be installed up 4gig which is the max. Consult you manual or Asus website on memory configuration

That must be an ASUS limit. I am running an MSI k8n-sliF with 4GB of DDR 400 with no problems. I did have to enable the Discrete MTRR option and the H/W remapping of memory. I am runnign x64 with no issues.........my x86 OS crashes when I try to use Media Center to watch Live TV though...not sure if it is related to the memory remapping(since the bios mentions this is only for 64 bit OS')

In my computer, Vista 5728 has stopped to see the full 4GB.
My BIOS detects 4GB, and also SpeedFan, but Vista (now) only reports 2047 MB.
"geo85706" wrote:

Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo

Vista only recognizes up to 4Gb of ram... so have fun...
"jesusg" wrote in message

In my computer, Vista 5728 has stopped to see the full 4GB.
My BIOS detects 4GB, and also SpeedFan, but Vista (now) only reports 2047 MB.
"geo85706" wrote:
Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo

2047 MB < 2 GB :)
I know that 32 bits Vista can only address 4GB, but I want my 4 GB, not 2 GB.
"Krax" wrote:

Vista only recognizes up to 4Gb of ram... so have fun...
"jesusg" wrote in message In my computer, Vista 5728 has stopped to see the full 4GB.
My BIOS detects 4GB, and also SpeedFan, but Vista (now) only reports 2047 MB.
"geo85706" wrote:
Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo

"jesusg" wrote in message

2047 MB < 2 GB :)
I know that 32 bits Vista can only address 4GB, but I want my 4 GB, not 2 GB.

The problem is that PCI devices (such as graphics card...) map their memory into the system memory address space.
You can see for yourself using Device Manager and look at View | Devices by type and then expand the Memory node.
Since many device drivers are developed by brain-dead morons, MS wisely decided to limit their 32-bit desktop Operating Systems to a 32-bit address space. XP (and Vista) does support PAE, but only as a way to enable DEP. Use Windows 2003 Server or Windows "Longhorn" Server if you insist on using a 32-bit OS.
Incidentally, nVidia used to support PAE, but all forceware drivers after 80.12 or so doesn't work correctly when faced with 64-bit addresses. (This might've been fixed in the latest driver revisions, I haven't tested this for a couple of months)
Finally, if you have a 64-bit OS (or 32-bit Windows Server), you need to activate the memory hole feature so that the memory controller will remap one or more memory banks above the 4GB mark.
Oh (sorry, when I said "finally" I lied), you should be aware that each 32-bit process is limited to a 2GB address space. With a 64-bit OS, this grows to 4GB. So even if you're only running 32-bit processes, you will see some benefit from a 64-bit OS.
-- Rune

Thanks, Rune
My problem is not related to the ~3GB XP limit.
I have seen the full 4GB, but during the software/hardware installation half the memory has gone. (I don´t know when it happened, but I'm sure it was in 5728, and I don´t remember any action that could make this).
From Device Manager, if I view Resources by type I can see the full address space to ffffffff, even some ranges in use by motherboard chipset, LAN adapters and graphics adapter, but there is an entry 80010000-ffffffff at the midle of the tree marked as 'PCI bus' that report a conflict (Memory Range 80010000 - FFFFFFFF not available.). I think this is a Vista bug.
I'll be happy to switch to x64 when some software makers develop 64bits drivers for their apps :)
--- Jesús Guinda
"Rune Moberg" wrote:

"jesusg" wrote in message 2047 MB < 2 GB :)
I know that 32 bits Vista can only address 4GB, but I want my 4 GB, not 2 GB.
The problem is that PCI devices (such as graphics card...) map their memory into the system memory address space.
You can see for yourself using Device Manager and look at View | Devices by type and then expand the Memory node.
Since many device drivers are developed by brain-dead morons, MS wisely decided to limit their 32-bit desktop Operating Systems to a 32-bit address space. XP (and Vista) does support PAE, but only as a way to enable DEP. Use Windows 2003 Server or Windows "Longhorn" Server if you insist on using a 32-bit OS.
Incidentally, nVidia used to support PAE, but all forceware drivers after 80.12 or so doesn't work correctly when faced with 64-bit addresses. (This might've been fixed in the latest driver revisions, I haven't tested this for a couple of months)
Finally, if you have a 64-bit OS (or 32-bit Windows Server), you need to activate the memory hole feature so that the memory controller will remap one or more memory banks above the 4GB mark.
Oh (sorry, when I said "finally" I lied), you should be aware that each 32-bit process is limited to a 2GB address space. With a 64-bit OS, this grows to 4GB. So even if you're only running 32-bit processes, you will see some benefit from a 64-bit OS.
-- Rune

I have a similar case: 4GB of RAM on an ABIT AB9 Pro motherboard. BIOS sees 4GB, WinXP Pro sees 4GB, but Vista RC2 sees 'only' 3326 MB...
Regards, Evert

"geo85706" wrote:

Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo

You are seeing the affect of a "memory hole" as a result of the design of the motherboards that goes back to the days of the original ISA bus. It was presumed back then that we would never have enough memory in our computers to ever see this loss. Most BIOS have a setting to recover some of the lost memory, but usually not all of it. If I recall correctly EFI is supposed to do away with the "memory hole."
Evert wrote:

I have a similar case: 4GB of RAM on an ABIT AB9 Pro motherboard. BIOS sees 4GB, WinXP Pro sees 4GB, but Vista RC2 sees 'only' 3326 MB...
Regards, Evert

"geo85706" wrote:
Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo

Same here. I'm using 4gb of 667mhz ram in my xps m1210. Vista Ultimate 64bit Edition only see's 3326. Mobo verifies 4 though. This is a let down..
"Evert" wrote:

I have a similar case: 4GB of RAM on an ABIT AB9 Pro motherboard. BIOS sees 4GB, WinXP Pro sees 4GB, but Vista RC2 sees 'only' 3326 MB...
Regards, Evert

"geo85706" wrote:
Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo

Hi John,
It's because there is a 4GB limit on the available addresses. Some of these are reserved for the system's addresses, the remainder (what you see) is what is available for memory addressing. This is a limitation in the 32-bit system. You should not see this in the 64-bit version unless either a module is bad or the mainboard is not reporting correctly (or doesn't support it).
-- Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP http://mvp.support.microsoft.com/ Windows help - www.rickrogers.org
"John" wrote in message

Same here. I'm using 4gb of 667mhz ram in my xps m1210. Vista Ultimate 64bit Edition only see's 3326. Mobo verifies 4 though. This is a let down..
"Evert" wrote:
I have a similar case: 4GB of RAM on an ABIT AB9 Pro motherboard. BIOS sees 4GB, WinXP Pro sees 4GB, but Vista RC2 sees 'only' 3326 MB...
Regards, Evert

"geo85706" wrote:
Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo

I am not an expert ( but I read many posts & then tried this ) & the issues was fixed 1st try... !! : ' ) enter Bios Advance chipset features memory hole for PCI MMIO enable feature! this feature is to remap to address above 4G of ram save settings & exist its all there now! from 3070 to 4094!
"geo85706" wrote:

Vista does not see the extra gig of memory, i have 4 1 gig ddr400 memory installed and the motherboard sees it but vista don't. -- geo