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Re: ASUS A8N-SLI memory issues
Imondeau, do you still have you're manual for the ASUS A8N-SLI Premium? Please turn to page 2-12 & 2-13.
Need the manual? Click the link below & download it. http://support.asus.com/download/download.aspx?modelname=A8N-SLI%20Premium&SLanguage=en-us
The QVL; Qualified Venders List, shows all the tested memory for this board. Edge memory is not supported. This is why the Edge memory only runs by it's self. Once you add the corsair memory they clash because they are not compatible working together in this Asus board. Both sets of memory could work in another board. (Maybe)! What is also needed is if the corsair & edge DIMMs are SS = Single sided or DS = Double sided. How many chips on the corsair? How many chips on the Edge?
They must have the same total chips each each DIMM.
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Just because BIOS is recognizing the RAM doesn't necessarily mean it is usable. Also, ASUS recommends that you have the same amount of RAM in each bank. Another point they make is that your motherboard does not support double-sided DIMM chips.
I would refer to the manual for their specific instructions on proper RAM configuration:
If you are concerned that the memory stick might be bad, swap it out with one of your older ones, and see if your system boots and performs as it should. If not, then you know it is bad. My guess is that if you populate the memory slots with 4 gb, the system will recognize and make all of it available to you.
If you installed total 4GB memory, the system will detect less than 4GB of total memory because of address space allocation for other critical functions, such as:
- System BIOS (including motherboard, add-on cards, etc..) - Motherboards resources - Memory mapped I/O - configuration for AGP/PCI-Ex/PCI - Other memory allocations for PCI devices
Different onboard devices and different add-on cards (devices) will result of different total memory size. e.g. more PCI cards installed will require more memory resources, resulting of less memory free for other uses.
On a SLI system, since PCI-Ex graphic cards will occupy around 256MB, another 256MB will be occupied after you install a 2nd PCI-Ex graphic card. Hence, 2.75GB memory left only if two SLI cards installed on A8N-SLI Premium while 3.0GB memory left with one graphic card without other add-on devices.
This limitation applies to most chipsets & Microsoft Windows 32-bit version operating systems.
If you install Windows 32-bit version operating system, we recommend that you install less than 3GB of total memory. If more than 3GB memory is required for your system, then below two conditions must be met:1. The memory controller which supports memory swap functionality is used. Chipsets later than Intel 975X, 955X, Nvidia NF4 SLI Intel Edition, Nvidia NF4 SLI X16, and AMD K8 CPU architecture support memory swap function.2. Windows 64-bit OS which can address more than 4GB memory.
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. http://www.memtest.org/ 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. http://support.asus.com/download/download.aspx?modelname=A8N-SLI%20Premium&SLanguage=en-us
Hi bart, please re-check you're memory. See page 1-17 in you're user manual. (Read everything)!
You're Asus board can not use 184-pin DDR DIMM's.
Also check the QVL list for supported memory page's 1-18 & 1-19.
I did not see Corsair on either page.
You're board can only use 240-pin DDR2 memory. Please read the "Notes" at the top of page 1-18.
If everything (Regarding memory) is within the Asus specifications than clear the cmos/bios & re-boot again. If you're system still does not boot than remove one DIMM & try again.
Asus warrants their boards for three years. Call Asus tech at
1-812-282-2787 EST, IL 8:00AM to 5:00PM. The call is on you but the service is free. It's worth every dime.
Good Luck & Kind Regards.
Would you be kind enough to let me know what Asus suggested? (If it comes to that).