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Mobo not detecting full amount of RAM

This is a discussion on Mobo not detecting full amount of RAM within the RAM and Power Supply Support forums, part of the Tech Support Forum category. Hello everyone I am having an issue with my computer where my mobo doesn't detect all the RAM that I


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Old 12-29-2009, 10:36 PM   #1
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Hello everyone I am having an issue with my computer where my mobo doesn't detect all the RAM that I have installed. I have 6 gigs installed and my mobo picks up 3gigs. I tried switching out the modules and same thing happened, about half of the RAM gets picked up.

When I put in 2gigs- I get 1024mb detected and my mobo reports single channel being used.

When I use 4 gigs- I get 2048 detected and it reports single channel detected.

When I use all 6 gigs- I get 3gigs detected and dual channel asymmetric is reported.

I have an ASUS P5B-SE Mobo, using Patriot ddr2 800mhz. I have flashed the BIOS with a new version and still nothing.

OS Name Microsoft Windows 7 Ultimate
Version 6.1.7600 Build 7600
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name HANS-PC
System Manufacturer System manufacturer
System Model System Product Name
System Type x64-based PC
Processor Intel(R) Core(TM)2 Duo CPU E6850 @ 3.00GHz, 2997 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 1103, 6/4/2009
SMBIOS Version 2.5
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "6.1.7600.16385"
User Name Hans-PC\Hans
Time Zone Eastern Standard Time
Installed Physical Memory (RAM) 3.00 GB
Total Physical Memory 3.00 GB
Available Physical Memory 2.17 GB
Total Virtual Memory 6.00 GB
Available Virtual Memory 5.08 GB
Page File Space 3.00 GB
Page File C:\pagefile.sys
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Old 12-30-2009, 06:14 AM   #2
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32 or 64 bit op system?
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Old 12-30-2009, 06:29 PM   #3
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64 bit
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Old 12-30-2009, 07:56 PM   #4
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What does it show if you use two sticks in the Yellow colored slots?
I use Asus Mobo's almost exclusively and many don't play well with Patriot performance series RAM but don't seem to have the same issue with Patriot value line.



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Old 01-01-2010, 08:50 PM   #5
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When I return home I shall let you know.
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Old 01-02-2010, 02:32 PM   #6
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I am getting the same reading while using both the black and yellow slots. I am starting to think that it might be the mobo.
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Old 01-02-2010, 03:39 PM   #7
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Before condemning the Mobo I would want to try a different brand of RAM.



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Old 01-03-2010, 01:37 AM   #8
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I might just have to do that. The thing is ive had this memory for a while on and all of the sudden it took a crap on me, ill have to do some further testing with some other RAM. Thanks for all the help.
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