Question about ASUS A8N-SLI Premium Motherboard

1 Answer

Will not recognize Ram

I have 4x512 sticks of corsair value select. In pairs of 2, they both work fine and the BIOS recognizes that there is 1024 ram available. However, when I use all 4 the BIOS recognizes only 512 megs are available instead of 2gigs.

Posted by on

  • imondeau Jun 17, 2008

    ASUS A8N-SLI Premium MB

    Ram Sets -

    1. CORSAIR ValueSelect 512MB 184-Pin DDR SDRAM DDR 400 (PC 3200) x 2

    2. Edge (I think) 512MB, DDR, DIMM x 2 - I could not find the precise information on this kit.

    For clarity, both sets work independent of each other totally 1gig recognized by BIOS. However together (A1B1, A2B2 OR A1B1, A2B2) they only recognize 512mb of ram.

    Is the solution that I need to buy another set of exactly the same (i.e. corsair value select?) or the exact same type PC3200/400?

    Side note: This is only an issue because my corsair high quality ram died and is being replaced, but is taking forever.

  • duy8910 Dec 29, 2008

    i have a problem with my ram. My computer originally came with 512mb of ram (DDR2 SDRAM). After having it for two years, i replaced that 512 ram with a 1Gig. Not long after that, i bought another 1 gig stick because my PC can support 2 gigs of ram. The problem is, my Pc wouldnt recognised both of the ram, it should be showing 2 Gigs of Ram but instead, it showed only 1gig. 've tried taking out one ram and out each of them in different slot, my computer can recognised them but when i pt them both together, my computer would not recognised, i've tried to put my 1 gig ram with my old 512 ram and my computer would recognised them instantly, but when i put both of my 1 gig ram sticks together, it only shows 1 gig,.I've went into the set up and it shows one slot is empty but i had both of them properly installed. Can sumone help me out here, i'll appreciate it...both of my 1 gig ram sticks are at same speed, DDR2 800. One is kingstona nd the other is apacer.


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 2,351 Answers

Insert a pair of memory so you again can see a total memory of 1024GB. Check the slots you have them inserted in. It should be DIMM A-1 & B-1. (Correct)? Remove both & insert the second pair. Use A-1 & B-1 again. Check total memory reported by bios. If you see anything less than 1024GB, that set of memory has an issue. Continue to leave in that set of memory. Go to this link & download memtest86 to a floppy disk & test the memory. You'll find the download section just under the three screen shots.
Each set of dimm's should be placed like so. One matched pair in dimm A-1 & B-1. Second set insert into dimm A-2 & B-2. The bios should see the total as 2GB. Run memtest only while using one set of matched 2x512 memory at a time. If there is a problem with the memory memtest86 will find it.
Though the information should fix you're issue, (or catch some bad memory).
It wouldn't hurt to check if a bios upgrade will help also.
Click on this link & check you're bios version against Asus updates. Please only update if you are sure the update will help.

Good Luck!

Posted on Jun 17, 2008

  • Mike Peluso
    Mike Peluso Jun 17, 2008

    Hi imondeau, its always suggested to use the same brand & type so all you're memory can function at the correct seed. I would say the Edge seems to be the trouble. This will clear up when you put in the replaced corsair.


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

I have an ECS RC415ST-HM (Alhena5-GL6) motherboard and need to upgrade the AMI BIOS

have you installed the right ram always try to use the same brand name and types of ram some motherboards will not use multiple types of ram together (be compatible)

IE: corsair ddr3 low density or high density and always place the larger ram module closest the CPU central processing unit

if you're not sure if a module is right for your system, use the Crucial Memory Advisor tool for a list of guaranteed compatible modules.

first you will need to select the manufacturer from a drop down list then select your product line from a drop down list then select the model then click find it will take you directly to compatible ram also you will have an option to scan your system

you should always ask for a guarantee on the compatibility before making any purchase and try to buy for working pairs if possible

hope this helps

Sep 19, 2012 | Computers & Internet

1 Answer

I bought this board with a p4 3.06mhz and 2 512mb corsair 400mhz ram, fastest at the time. I can't get any other ram to work in it. tried pny pc3200. 1ghz , some 256 pc2700's and some others and it won't...

you need to reset the cmos to recognize the ram, this is done by removing the cmos battery and joining conductive wire to the pos and neg term where the battery sits, earth out for at least 6 seconds, this takes place after inserting new ram, hope this helps

Feb 14, 2011 | Soyo P4X400 Dragon Lite (P4X400DRAGNLITE)...

1 Answer

RAM Slot does not recognize more than 512MB ( 184 )

Consider updating your motherboard bios.

Also make sure that your memory is correct for this system:

- Max. capacity of system memory: 2GB DDR or 2GB SDRAM
- DDR x 2, DDR266/200 non-ECC, un-buffered memory
- SDRAM x 2, PC133/100 non-ECC, un-buffered memory

Jun 26, 2010 | Asrock K7VT2 Motherboard

1 Answer

Won't recognize all my ram

Clear the CMOS with the jumper, and download the latest BIOS file for your motherboard. Make sure DUAL channel is not enabled.

Jan 25, 2010 | VIA Asus A8V Socket 939 Motherboard -...

2 Answers

ASUS P5VD2-MX SE recognizes only up to 2500MB RAM


Actually you are doing better than you think, According to your MB specs it is only supposed to hold a max of 2GB (1GB per slot). The updated BIOS may be allowing for the additional 500MB.

If you would like to verify, here is a link to the manual for your MB:

P5VD2-MX SE Manual

See page viii.

Thanks for using Fixya.


Sep 09, 2009 | ASUS P5VD2-MX SE Motherboard

1 Answer

Ram assurance

The schematic layout of the P5VDC-MX on the user manual shows that there are 4 DIMM banks, set as 2 X 2 rows, 2 DDR2 and 2 DDR.

The user manual explicity states:

I am running different frequency modules without any problems. With the info above provided by ASUS, it may be possible that a fix could be available with a BIOS update. Otherwise, you can opt to use a lower capacity RAM along with your 1GB Corsair.

Hope this helps.

Jun 24, 2009 | ASUS P5VDC-MX Motherboard

4 Answers

2G Memory Upgrade

I had similar problem with CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory

If this is your RAM:
Corsair 1024MB Value Select PC2-4200 (533MHz) DDR2 RAM, 128Mx64non-ECC, 240-pin DIMM, Unbuffered, CL4, Lifetime warranty (VS1GB533D2) Then it is high density. You need low density to work, look for one ending with an 8, not 64.

Feb 26, 2009 | PC Chips P23G Motherboard

2 Answers

4GB memory not being recognized

To recognize more than 3.5GB RAM you must use a 64 bit operating system
ordinary 32 bit O/S only recognize max of 3.25 to 3.5GB ram

Oct 31, 2008 | ASUS A8N-SLI Premium Motherboard

1 Answer

Ram install

1. bad memory
2. the motherboard doesnt support single sided and dual at the same time.
3. bios needs update
4. wrong slots for dualchannel?

Apr 05, 2008 | Intel Motherboard

1 Answer

Ram problems

Your memory should be in slots A-1 & B-1
You Asus board uses the Award bios. The link posted below will tell you what your beeps are saying.

In your case do as I suggested above. I have two working
A8N-SLI Deluxe boards & the memory works fine in A-1 & B-1 slots.

Good luck & best wishes!
please vote.............................

Mar 14, 2008 | ASUS A8N-SLI Deluxe Motherboard

Not finding what you are looking for?
ASUS A8N-SLI Premium Motherboard Logo

Related Topics:

369 people viewed this question

Ask a Question

Usually answered in minutes!

Top ASUS Computers & Internet Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18330 Answers


Level 3 Expert

753 Answers

Are you an ASUS Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides