OS and Software > Microsoft Help > [Vista] x64 4 GB installed. 3.05GB available.

[Vista] x64 4 GB installed. 3.05GB available.

Take a look at the following at the following MS KB article and see if anything applies:

»support.microsoft.com/?id=929605

The information under the "Workaround" lists all the requirements that must be met for the full 4 GB to be used.

One thing, make sure the memory remapping feature is "enabled' in the BIOS.

reply to Bagnon

What kind of video is the PC using, on the MB or expansion card? If it is on the MB some system RAM is used for video memory, which is controlled in BIOS. Also getting into numbers that big there is a difference betwenn 1000 and 1024.
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reply to Bagnon
Radeon 1900XT 256MB.

reply to Bagnon
Look in the bios for memory remapping and make sure it is enabled. I had to do that with my older msi board even with x64 windows.
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reply to Bagnon
Don't worry, your computer is using all 4GB of memory. I have the same motherboard.

What you're seeing is how much your computer isn't using for programs plus Windows resources; available free memory. I guess it ignores superfetch when displaying that value.

Mine showed 2.79GB, I rechecked system information and it now shows 2.82GB.

You can confirm this with Task Manager; Physical Memory #%, which mine shows 29-30%.

reply to djdanska

Where in the BIOS do you see 3.3GB usable?
I couldn't locate it.

What BIOS version are you using?

To access this memory, in your BIOS I believe it's called "Memory Hole Remapping". According to some posters in other forums, starting with BIOS v1009 the setting should be under memory configuration.

»www.hwbot.org/forum/showthread.php?t=1564

The default is Disabled so try switching it to Enabled.

reply to Airwolf
Sorry I misread your post and missed your question.

While within my BIOS settings I would see the 2GB DIMMs installed, during POST, when the machine first boots, I would see what processor I had, what speed it was running and the POST reported something like 3.3GB of RAM even though I had 4 installed. I run an Intel chipset (Asrock X48) but my symptoms were identical to yours.

After some reading I learned about this memory remap setting in some BIOSes and looked in mine. I found it and changed it from the default DISABLE to ENABLE. After saving the BIOS setting and restarting, when the machine posted again, the 3.3GB changed to 4GB. And when I finally got back into Vista x64 I had all 4GB of memory usable by the system.

Everest can report used memory regardless of what that address space is being used for. It may not be YOU using that 900MB, but the system using that address space for hardware, video RAM if you use onboard video etc.

reply to Bagnon
I'm using 804 and it's enabled by default.

That's an old BIOS revision from Jan of 2007. I would update to the latest one. 1009 people say introduced a lot of new BIOS settings and they're currently on 1105 from late July 2008.

»support.asus.com/download/downlo···2R32-MVP

1009 is buggy.

HT Link is fixed at 5x and the power leds won't work.

804 works fine for me. The latest one doesn't bring anything new other than cpu support.

Try 1105 which is the latest.

What does 1105 fix that isn't broken?

Running vista 64 with 4GB or less is a waste, because everything will use MORE memory than when running in 32 bit vista. Unless you are running applications written to run as 64bit apps ONLY which otherwise would not run in vista 32, you are actually decreasing your performance by running only 4GB of memory in vista 64.

Tom's Hardware recently had an article about Vista 64 bit & memory use.

»www.tomshardware.com/reviews/vis···775.html

reply to Airwolf

I'm not having a problem?

Sorry, brain fart, got you confused with the OP. That's what I get for not scrolling up.