Tom's Hardware > Forum > Motherboards & Memory > Memory > ASUS P5KPL: 4GB installed, BIOS shows 3584 MB

ASUS P5KPL: 4GB installed, BIOS shows 3584 MB

Forum Motherboards & Memory : Memory - ASUS P5KPL: 4GB installed, BIOS shows 3584 MB

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macic7   11-06-2008 at 10:41:48 PM

I have an ASUS P5KPL motherboard (Intel G31 chipset), an Intel E2180 CPU, a Radeon HD 3650 graphics card and two 2GB sticks of Transcend DDR2 RAM. However, the BIOS detects only 3584 MB of RAM. In Windows Vista x64, the System Properties window shows that I have 4 GB of RAM, as does CPU-Z, but Task Manager sees only 3582 MB. Is there a way to make the missing 512 MB available?

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Anonymous   12-19-2008 at 08:59:23 AM
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Hi frind
asus p5kpl mb in not oc - then by graphic ram size rec of sys ram

exampel --- my graphic is 8600 1 gb ----- 1gb of ram recorded :hello:
your graphic is 512 then 4096 = 3582 - for oc technology :ouch:

exuseme for bad language by dear :bounce:

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tcsenter   12-19-2008 at 01:31:42 PM
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macic7 wrote :

I have an ASUS P5KPL motherboard (Intel G31 chipset), an Intel E2180 CPU, a Radeon HD 3650 graphics card and two 2GB sticks of Transcend DDR2 RAM. However, the BIOS detects only 3584 MB of RAM. In Windows Vista x64, the System Properties window shows that I have 4 GB of RAM, as does CPU-Z, but Task Manager sees only 3582 MB. Is there a way to make the missing 512 MB available?


Nope, because the Intel G31/P31 chipset is hard-limited to 4GB (32-bit) total address space and does not support memory remapping over 4GB. Vista w/SP1 will correctly report total installed memory, but this does not mean all of it is being utilized. As you note, Vista is only utilizing the same ~3.5GB "ish" that Windows XP is utilizing. This is an actual chipset limit for G31/P31, 64-bit OS isn't going to change it.

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pgoyette   12-19-2008 at 05:35:21 PM
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As tcsenter points out, the chip is limited to a total of 4GB address space. And the PCI bus adapters need some address space, toherwise you won't be doing much I/O. The "missing" 512MB of RAM is due to the BIOS mapping the space needed by PCI bus.

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doomsdaydave11   12-19-2008 at 08:42:37 PM
- 0 +

Anonymous wrote :

Hi frind
asus p5kpl mb in not oc - then by graphic ram size rec of sys ram

exampel --- my graphic is 8600 1 gb ----- 1gb of ram recorded :hello:
your graphic is 512 then 4096 = 3582 - for oc technology :ouch:

exuseme for bad language by dear :bounce:



sorry but we have no idea what you're talking about

------------------------------ E8400 3.6Ghz | 4GB DDR2-800 | HD4870 | 780GB HDD Space | VX550W | WinXP | Win7-64 | Ubuntu Studio 8.10

 

Reply to doomsdaydave11

aeroman   10-14-2009 at 08:07:13 PM
- 0 +

Go into your BIOS at boot by pressing Del, Go to Advanced then Chipset.
Select North Bridge Configuration and ENABLE Memory Remap Feature

This will give back your missing 512Mb totaling it out to 4 GB.

This has worked out for others with the same mobo, it will help u too.

Reply to aeroman
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