Question about AOpen AX4SG-UN Motherboard

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Long beeps on start-up & shows nothing

I recently purchased a Aopen AX4SG-UN it has dual channel memory slots, i have a single 1gig stick of memory in the primary slot of the first channel and no other memory. it has a 2.6ghz p4 in it. when i turn it on it shows nothing on the screen, it just gives long beeps, how do i make it work?

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  • kfl_420 Jun 19, 2009

    the computer is a custom computer. the motherboard is a AOpen AX4SG-UN. its a socket 478 for pentium 4, with intel 865g + ich5 chipset, 800mhz fsb, ddr dimm x 4, 8x agp slot, dual ddr400 with intel extreme graphics, and the mb supports dual channel memory. the stick of ddr400 i have in there is 1gig stick. i just bought this board, ram, and cpu together, the guy said we he used it, he had memory in both channels, im wondering if i have to have memory in both channels

  • kfl_420 Jun 30, 2009

    1 gigabyte, ddr400, pc3200.

  • Raymond Ramirez
    Raymond Ramirez May 11, 2010 much ram is on that stick and what is the specifics of the ram?



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I can almost assure you that those beeps are telling you that you have burnt out your memory due to the static electricity of your body. If you are sincere give us the information we ask: (1) Manufacturer's name and Computer Name; (2) Model Name and Number; (3) The ID information of the mother board. If you can't find it we will help you! (4) We need a detailed report from you about what happened! Before the failure, during the failure, and after the failure. Send that info. and we will be in business.
My name is Constantin (arzconst is mu internal nickname with

Posted on Jun 16, 2009


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Nforce4-a939 board ,my system shows single channel 64 bit but on perchasing it was dual channel 128 bit how can i fix it......

The 128-bit mode is achieved by putting _matching_ sticks of RAM in the RAM-slots. Non-matching RAM will run as "single-channel" (64-bit) mode.

Matching RAM must have the _same_ amount of RAM per stick,
and the same internal "timing" parameters (look closely at the RAM for strings like 3-2-2 or 2-2-2-2).

If you have exactly 2 RAM slots on the motherboard, matching RAM will always run in "dual" mode.

If you have matching RAM, and you have 4 RAM slots, put one stick of RAM in slot #1, and one in slot #2, and leave #3 and #4 empty. Start it up, to see if it is using "dual" mode.

If not, shutdown, power-off, and move the RAM from slot #2 to #3, and start it again. This time, it will run in "dual" mode.

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I have a problem with the ram, using more than 700 MB it seems it get into conflict with the USB ports, and now after a few second windows starts, all USB ports die

Seems like the ram is faulty, i havent herd of ram conflicting with usb before, as the ram memory uses hex-demimal addresses from the processor and usb is port which use irq requests. I think your best bet is invest in a new ram stick.

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Will P4M80-M4 motherboard support dual channel memory?

This is an older board. The VIA chipset pre-dates dual channel memory support. If your board is working fine, this should not be a concern.

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Setup with AX4sg-UN Motherboard won't boot into win7

Have you tried booting into safe mode? If the hdd was preloaded with Windows 7, it's trying to use the old drivers to the old board. I've ran into this same problem when I tried to move a preloaded hdd to a different mobo. Do you still have your Windows 7 disc?

Dec 30, 2009 | AOpen AX4SG-UN Motherboard

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I have a AX4SG-UN system and first of all it takes a long time to come on.

How long? Some motherboards run an "extensive" P.O.S.T. (Power On Self Test) in order to confirm that the motherboard is running correctly.

Has it _always_ taken a long time, since the day that you purchased it?

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Won't go into Bios or display anything

Hi kwilson709, you sound like you know what you’re doing. Did you hear any beeps when you first started up the system?
Your must use the Intel (Northwood) CPU on the AOpen AX4SG-UN.
Make sure the 4-pin 12V. ATX Power Connector is seated & locked, same with the 20pin ATX main power connector. When you clear the cmos jumper, pg 24 in your manual. Remove the battery & check its voltage for 3 volts, if it reads anything less replace the battery.
If your graphics card is an add on & not integrated on to the motherboard, remove & blow out the slot with canned air & clean the contacts with a couple drops of alcohol on a cotton swab or to & reseat. Do the same for your memory. If the graphics card has dual VGA out puts check both for possible display. Make sure the monitor works.
(One never knows). Try one DIMM if you are running two DIMM's or more. If all of the above fail, it’s suggested that you remove the motherboard from the case & lay it on a table with a piece of cardboard under the motherboard. Hook up your power supply, graphics card (If you’re using one), memory (One DIMM & hard drive, mouse & keyboard. Once everything is connected short the two pins for power on with the tip of a pen to start up the system. Check for display. Still no display? (Only if you have one), try a lower MHz compatible CPU. Other than what’s mentioned above I'd say it’s the motherboard. (Testing the motherboard out side of the case is used to eliminate a possible case issue).

Good luck!

Aug 28, 2008 | AOpen AX4SG-UN Motherboard

1 Answer

Gigabyte mb wont recognise dual ram

please check in bios for dual boot option.plz note for dual - channel configuration your ram should have same frequency and speed.

Apr 21, 2008 | Intel Motherboard

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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?

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2 Answers

Ax4sg-un doesn't start

Do you have any boot devices connected to it at all?

Are you using the correct memory for it?

Are you sure the ram is compatible with the mobo? Try taking all but one stick of RAM out and see if it still does it.

The long beeps tend to point to a RAM problem, or it's possible it can't "find" a hard drive4.gif.

Some motherboards support dual channel (you'll see different color slots), and some don't. If you try to put the sticks in dual channel configuration, and the cpu4.gif or the motherboard doesn't support dual channel, you may experience this.

If you have different color slots, put one stick in one color slot, and another stick in the other color, or vice versa.

The manual "should" tell you the proper configuration for this, and may even tell you what the beeps stand for.

If you can post the make / model of all the components, I can do the "dirty work" for you and see it if should all work together.

Jan 10, 2008 | AOpen AX4SG Max Motherboard

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