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Asus motherboad only reads half memory

Last response: in Motherboards
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August 3, 2011 1:19:57 AM

I have an Asus A8N-E motherboard and I have 4GB installed but it onl6y reads 2GB. What can be the problem? Is there a switch oir jumper I need to manipulate?

a b Ĉ ASUS
a c 156 V Motherboard
a b } Memory
August 3, 2011 4:10:10 AM

do you use a 32 bits or 64 bits os system
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a b Ĉ ASUS
a c 97 V Motherboard
a b } Memory
August 3, 2011 6:25:27 AM

A8N is an older board. Make sure you have a 64bit bios on it. You may also need to change the memory remap setting in the bios.

Does the bios see all 4GBS?
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August 3, 2011 3:57:06 PM

No the BIOS doesn't see the 4GB either.
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a b Ĉ ASUS
a b V Motherboard
a b } Memory
August 3, 2011 5:08:40 PM

Turn on pc use 1stick only for checking and try in another slot .. If 1stick fail RMA
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a b Ĉ ASUS
a c 97 V Motherboard
a b } Memory
August 4, 2011 1:22:55 AM

Heny is right, check to make sure both sticks work. Test them one at a time. If they both do, you need to update your bios. Hopefully on exists that you can use 4GBs of ram with that board. If not, you're SOL.
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a b V Motherboard
August 4, 2011 2:48:54 AM

The last bios for the Asus A8N-E was released on May 3, 2006, bios version 1013. It's possible that his board is simply starting to fail due to age. The board was released 6 years ago, with a maximum memory support of 4GB.

4745454b said:
A8N is an older board. Make sure you have a 64bit bios on it. You may also need to change the memory remap setting in the bios.

Does the bios see all 4GBS?

Bios is only 8-bit....

4745454b said:
Heny is right, check to make sure both sticks work. Test them one at a time. If they both do, you need to update your bios. Hopefully on exists that you can use 4GBs of ram with that board. If not, you're SOL.


The board supports a maximum of 4GB with the initial bios firmware. If he's using 2, 2GB sticks, he's lucky it even posts. The A8N-E only supports 1GB per slot, which means 4x1GB sticks to reach 4GB (page 1-15 of the Motherboard's User Manual).
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a b Ĉ ASUS
a c 97 V Motherboard
a b } Memory
August 4, 2011 4:17:17 AM

That's probably the issue then. Memory density to high? Odd that this info would be in the mobo manual seeing as the memory controller is on the chip. We don't know what CPU he's using.
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a b V Motherboard
August 4, 2011 11:59:06 PM

The memory controller is still subject to firmware limitations....
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