I have a Abit As8 that I recently added 2 GB of matching ram to bringing up to a total of 4 GB. It is only showing as 3.25 GB installed. When I remove 1GB of ram, it shows as 3GB installed. How can I get the machine to use all 4 GB? Thanks

Hello here is the homepage:

http://abit.ws/page/mi/download/download_driver_detail.php@pFILE_TYPE=Driver&pMAIN_TYPE=Motherboard&pTITLE_ON_SCREEN=AS8&pSOCKET_TYPE=LGA775

Post code 21, is a memory/ chipset problem.

It could be a problem with a ram module, or a Pci sound card or a graphic card. or powersupply.

Try to remove any add in cards, and try to boot with only one stick of ram.

Good luck

Hello the drivers can be downloaded here:

http://abit.ws/page/mi/download/download_driver_detail.php@pFILE_TYPE=Driver&pMAIN_TYPE=Motherboard&pTITLE_ON_SCREEN=AS8&pSOCKET_TYPE=LGA775

Just click on one of the links for download.

Good luck

Hi, you can see the specifications here:

http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?pMODEL_NAME=KN8+Ultra&fMTYPE=Socket+939

Try to download a manual.

My guess is that your cpu does not support that amount of ram.
The ram must also be at an equal size.
Your operating system must be a 64 bit to handle
more than 3 gb of ram.

It depends on what you would like the end result to be. If you need to multi-task, and have 10 windows running at once, go with the 4GB @ 5300 because while it might take a little longer your computer will still be able to handle all the information. However if you are just using it for light browsing and would prefer speed over bulk (when it comes to data processing) go with the 2 @ 6400. I don't think it would be worth it to get 2 more @ 6400, technology is advancing so fast. If you have 60 bucks you can upgrade to two 4GB @ 10600 (8GB total for $60) 1333MHz PC3. Lookup Corsair XMS3 4GB RAM.

are they of the same brand/type some motherboards only accept specific brands to work together be compatible
hope this helps

Sounds like the second RAM stick was placed in the wrong slot. I would suggest checking your motherboard manual to determine this. Some motherboard designs have unusual slot arrangements.

This is the limitation of a 32 bit (x86) Operating System. A 32 bit OS can detect upto 3GB RAM only.

You may either try installing the x64 Bit of XP Operating System or Vista Service Pack 1 or 2 for 32 bit Vista Operation System to resolve the issue.

After installing the SP 1 or 2 of the Vista OS in the Computer, the OS will detect 4GB RAM.


Good Luck!!!!!!!!!!!!!!

Are they exactly the same brand and model? Sometimes they dont like to mix and match. Say you have the Left and right ram slot. Does each single stick work alone in the left and the right slot? Sounds like you may have a dead ram slot.. :(

Your mobo is quite old and its chipset can only support a maximum of 512MB PER SIDE (technically called a bank) of a memory module. I would guess that your 1gb memory module has 8 chips that are all located on one side of the module, putting all of the 1 GB on one bank. Thus, only 512MB of your 1 gb RAM is detected and usable by your motherboard (the remaining 32 mb is most likely being used by your onboard video). You'll need to find a double sided 1 gb memory module (usually 8 chips on each side).

may be frequency is different of RAM,just check it