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6GB installed only 4GB show in BIOS and Windows 7

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September 15, 2010 8:49:35 AM

Basically, I need to know how to test to see if I have a bad stick of RAM or a bad DIMM slot, because I've changed the voltages and it has not helped at all.
a b } Memory
September 15, 2010 9:28:55 AM

Try testing with each 2GB sticks simultaneously and see if it boots fine to windows and its fully recognized.
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September 15, 2010 11:59:59 AM

Check if you have memory remapping enabled in the BIOS. If you have it disabled you will only see 4 Gig MAX.

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September 22, 2010 3:15:17 AM

Where exactly is that under? (the memory rempping cuz i tested each slot and each stick and they all read and boot up.
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a b $ Windows 7
a c 347 } Memory
September 22, 2010 5:15:54 AM

^+1 8/10 - Windows 32-bit {2^32 = 4GB max} ; 1/10 BIOS H/W reserved {HDD Partitions} ; 1/10 Bent CPU pins.

BTW - Welcome Newcomer! :) 
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September 27, 2010 2:43:57 AM

No i have windows 7 64 bit.
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a b $ Windows 7
a c 347 } Memory
September 27, 2010 2:57:39 AM

Post the following:
Verify these settings

Resource Monitor
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October 2, 2010 12:25:46 AM

in my resource montior it only shows 4gb total :(  idk what that means and idk how to post screenshots :( .
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October 2, 2010 12:26:51 AM

And my system configuration looks exactly the same as the shot posted.
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a b $ Windows 7
a c 347 } Memory
October 2, 2010 2:20:27 AM

The (2) Values that say it all are Total & Installed, problems are when Hardware reserved {grey} are big numbers e.g. >1000 MB. Typically 32-bit causes H/W Reserve or "wasted" memory to be high. Causes: 32-bit, Memory Mapping in BIOS not set correctly, Maximum Memory in MSCONFIG, Hard drive Partitions, bad RAM stick(s), etc.

To capture a screen simply press the {PrtScn} for full screen capture, or {Alt + PrtScn} for a window; next open a free account {example http://photobucket.com/ } and in the "Add a reply" use the Add photo option or click in the IMG Code & Paste {IMG]URL[/IMG} - use [] brackets.
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October 2, 2010 2:40:50 AM

i have a mac usb keyboard, and theres no printscreen button is there a command to use instead?
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October 2, 2010 5:03:17 AM

A=944MB
C=944MB
T=4087MB
I=4096MB
HR=9MB
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a b $ Windows 7
a c 347 } Memory
October 2, 2010 5:34:28 AM

Okay, it's confirmed missing 2GB. You did not or I missed which MOBO you have, but look at the Manual regarding "Memory Remapping." http://support.microsoft.com/kb/929605

Next, in the BIOS: If it is only reporting 4GB there then there is an issue with a slot or one of the modules. You can check the bios to see how much memory is installed and you may need to change a memory remapping option.
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October 2, 2010 8:59:56 AM

weird, because i have windows 7 so that doesnt help, and I've booted it up and it's read 6GB in the Bios before, but it's not everytime, i wonder if theres a reason behind it.
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October 2, 2010 9:00:30 AM

oh and i have an ASUS p6x58d premium MOBO. with original BIOS.
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a b $ Windows 7
a c 347 } Memory
October 2, 2010 3:38:07 PM

tallfern said:
...I've booted it up and it's read 6GB in the Bios before, but it's not everytime, i wonder if theres a reason behind it.


That suggests: 1. Re-seat the DIMM(s) & clean-out both sockets & RAM connections {use a pencil eraser and wipe-off with Isopropyl or Rubbing alcohol & dry; use pressured air to blow-out DIMM socket}, 2. BAD Stick - determine which one works/fails & replace.

D/L and created a bootable CD/DVD with Memtest86 {ISO/zip}, run at least 2 passes ~ 2 hours - http://www.memtest.org/
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