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Missing Ram


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22 replies to this topic

#1 Menessis

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Posted 22 November 2016 - 12:02 AM

My pc started acting up.  Then I noticed that Win 7 was showing I have 8 gig of ram but only 4 usable.  So I thought that I had a bad dimm.  No big deal right.  Time for an upgrade.  I got 4 x 4gig which is the max allowable for this Alienware Aurora-R2.  (Ballistix Tactical 8GB Kit 4GBx2 DDR3 1600 MT/s PC3-12800 CL8 at 1.5V UDIMM 240-Pin Memory BLT2KIT4G3D1608DT1TX0 )

Now I boot up and Win 7 shows 16 gig but only 8 gig usable!

 

I had a look at Resource Manager and see the first 8 gig is "hardware Reserved".

 

So any thoughts?

 

Thanks for any help.

 

Menessis


Edited by Menessis, 22 November 2016 - 12:05 AM.


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#2 TsVk!

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Posted 22 November 2016 - 01:26 AM

This might help

 

  1. Press Start -> Run

  2. Type msconfig

  3. Go under the "Boot" tab

  4. Click "Advanced options" button

  5. Uncheck "Maximum memory"

    UTf3g.png

  6. Reboot

Better now?



#3 Menessis

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Posted 05 December 2016 - 02:08 AM

I checked that and it's OK.  Still problem persists.

 

Thanks

Menessis



#4 TsVk!

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Posted 05 December 2016 - 02:23 AM

This may be a channel RAM hardware error. If you check with the system diagnostics does it look at your RAM?

 

http://www.dell.com/support/Article/us/en/19/446143/EN



#5 TheDcoder

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Posted 05 December 2016 - 03:23 AM

Have you checked for a BIOS Update? I had the same problem with my laptop and it disappeard after a simple BIOS update :D

 

If you use a laptop or a company-built desktop, it might be easy to check for updates since they provide everything from drivers to BIOS updates on their website :)



#6 TsVk!

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Posted 05 December 2016 - 03:28 AM

That's a good idea.



#7 Menessis

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Posted 05 December 2016 - 07:02 PM

OK I did the system pre boot check.  I never knew there was such a thing.  Anyways it blasted through the ram and everything passed.  But what isn't clear to me is how much ram did it check?  2 x 4 gig or 4 x 4 gig???

 

Menessis



#8 TsVk!

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Posted 05 December 2016 - 07:28 PM

I'm not really up to date with many hardware checking facilities. I'm going to step back now as I'm sure there are people with more experience than me in the specific field.

 

Best of luck.



#9 JohnC_21

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Posted 05 December 2016 - 08:20 PM

Does your BIOS/UEFI settings show a total of 16GB? You may want to reset your BIOS settings to default.

 

Some links regarding your unit.

 

http://en.community.dell.com/owners-club/alienware/f/3746/t/19518927

 

https://www.alienwarearena.com/ucf/show/189363/boards/technical-support-1/ForumPost/where-s-half-or-my-memory

 

Edit: Make sure memory remapping is enabled in BIOS if you have the setting.


Edited by JohnC_21, 05 December 2016 - 08:31 PM.


#10 Menessis

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Posted 06 December 2016 - 07:47 PM

No the Bios only shows 8 gig.  I don't think there is a "remapping" option

 

Menessis



#11 JohnC_21

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Posted 06 December 2016 - 07:55 PM

Just to confirm, you have 16GB installed 4 x 4GB and your BIOS only shows 8GB? 



#12 TheDcoder

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Posted 06 December 2016 - 11:51 PM

No the Bios only shows 8 gig.  I don't think there is a "remapping" option

 

Now it's clear!

 

The BIOS is to blame, you should definitely try upgrading the BIOS as I suggested in post #5 ;)



#13 TheDcoder

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Posted 06 December 2016 - 11:54 PM

Looks like I have found a BIOS Upgrade for your PC!



#14 Mcinsane

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Posted 08 December 2016 - 12:30 PM

If your motherboard is setup with dual channel ram, you might want to confirm all your sticks are working properly. If 1 stick goes bad, you will lose 8gb, which might be why your only seeing 8gb.



#15 Menessis

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Posted 10 December 2016 - 01:32 PM

My manual says to use slots 1 and 2 for dual channel or slots 1 through 4.  I tested 1 and 2 and it shows that half is reserved.  I then booted up of just one.  Then switched to the second stick to confirm both sticks are good.  So I would say that its the slot or board or CPU rem controller.   I'm chicken to repeat the cpu!  LOL

 

Menessis






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