errors during post

Asus Asus a7v socket a motherboard tb/du...
February 2, 2010 at 14:56:29
Specs: N/A
I have an old system, a 1 GHz Athlon on an Asus A7V motherboard, which seems to be having issues. I have two sticks of RAM, both PC133 256 MB, and when inserted into slot 1 and 2 work just fine with the computer reporting I have 512 MB of RAM. If I put them in slots 1 and 3 I'm told I have 256 MB of RAM, if I put them in slots 2 and 3 the computer won't boot and I receive a continuous beep-beep-beep... error. Does anyone know what's going on? Thanks for any information.

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February 2, 2010 at 15:46:58
Go to the link below and download the manual for your board. On page 24 you will find an explanation of what RAM will work and how to configure it. May have something to do with density.

I believe the reason the computer just beeps when using 2&3 is because the first slot must be filled.

Why do you feel the operation system is not applicable? When trying to find files an OS is required on most sites.

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February 2, 2010 at 15:50:35
I have nothing connected to the motherboard but the power supply, RAM, a video card, a keyboard, the power button, and a pc speaker. At this stage, there's nothing to load an operating system onto.

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February 2, 2010 at 16:01:36
Do you have the manual for the mboard?

It says in mine

For optimum signal integrity, inserting the DIMMs..." (populating the slots) " the following order is recommended: DIMM1, DIMM2, DIMM3"

"DO NOT attempt to mix SDRAMS with VCM SDRAMS."
(VCM SDRAM is rare).

"This motherboard also supports NEC's Virtual Channel (VC) SDRAM" (it's rare).

512mb ram must be double sided - have 16 (or 18) chips

From a review I found on the web:

The default voltage on the ASUS K7V makes 3.4V instead of the nominal 3.3V. Nevertheless, ASUS decided to take the risk with its K7V mainboard and left on it a jumper that allowed changing voltage to a standard value. By the way, we wished they had never done this. At 3.4V voltage on I/O circuits ASUS K7V operates impeccably, demonstrating high stability and reliability, but at the official 3.3V voltage the mainboard's stability leaves much to be desired.

the mainboard has a jumper that allows supplying up to 3.56V to AGP, memory and chipset.
(VIO header near 20 pin socket; presently on 3.4; can be set to 3.3, 3.4, or 3.56)

The continuous error beeps are commonly made by Award bioses when you have a ram error.

You must make sure the ram you install is compatible with the mboard's main chipset.
It the ram passes diagnostic tests in all circumstances (sometimes you MUST populate the ram slots in a certain order), there's nothing wrong with it, or with it's connection to the slot.
- See response one in this for lots of info about that:

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February 2, 2010 at 16:48:21

So far, the only information I've found about the two sticks of RAM I have. From what I can tell, both should be compatible with my motherboard. When they're in slots 1 and 2 they add up to 512 MB. If my motherboard requires something to be in slot 1 and I only get 256 MB of RAM when I have them in slot 1 and 3, is it safe to assume slot 3 is dead then?

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February 2, 2010 at 19:04:27
If they work in slots 1& 2, what's the problem? If you want to test slot 3, add a 3rd stick.

BTW, if your 1.0GHz Athlon is the 100MHz FSB version, you should be running PC100 or underclocking your PC133 to 100MHz to match the CPU.

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February 2, 2010 at 19:32:40
If the third slot is bad, does that mean it's possible something or multiple somethings may also be wrong with the motherboard? Will running the computer with a bad memory slot that's unoccupied cause any problems?

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February 2, 2010 at 20:31:01
You're not "getting" it. You need 3 ram modules, all of which are compatible, in order to determine whether slot 3 is bad., because you're supposed to populate all 3 slots when you use slot 3.
It isn't significant whether the ram is recognized as the wrong amount or you get beeps and no boot when you're not following the manufacturer's recommendations.

If the ram tests fine when slot 1and 2 are populated, there's nothing wrong with the mboard and the ram is probably compatible with using it in this mboard.

Use a good light and possibily a magnifier to examine slot 3. If you see no damaged contacts, it's probably fine.

I've never encountered a "bad" ram slot, with the exception of when it was damaged by someone installing a module backwards and then attempting to boot the computer.

The date in my manual is 2000, so yours would be about the same age. There were lots of mboards made around that time that had to have the ram slots populated in a certain order.

If it's any consulation, I gave that mboard to a friend who had little money to spare and she's been using it for about 2 years. It works fine for XP, 512mb of ram, or was it 768mb (1 or 2 modules), 700mhz, a fairly recent AGP card in it.

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