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  Help with ASUS A7N266-VM 
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Robert Shores Jul 20, 2005, 02:44am EDT Report Abuse
>> Re: HELP!!! ASUS A7N266-VM
I'm betting you don't have a good enough power supply to run this board properly. What is the exact model of your replacement power supply? And just because the supply you have will run another computer, doesn't mea it will work with this one.

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forthe web Jul 22, 2005, 12:41am EDT Report Abuse
>> Re: HELP!!! ASUS A7N266-VM
Yes, U were absolutely right. Now I hav replaced the PSU, and the problem is gone. The psu from the other computer showed exactly same power ratings yet it failed to start the computer several times. But the exact replacement of my dead PSU from the same company, solved the problem.
Conclusion: this board is choosy wrt PSU, no matter what power ratings ;-)

Alexandru Nastase Sep 04, 2005, 11:05am EDT Report Abuse
>> Re: HELP!!! ASUS A7N266-VM
hi there...i see that ASUS A7N266-VM is one crazy having an wild problem with this one.when im playing a game that "fire up" a little bit the pc i got reboot.anytime, anywhere.i put an asus utility probe on it and surprise surprise...everything its ok...the temperature for the cpu is somewhere near 40, the temperature on mainboard its ok...everything its ok...i put an monitor hardware...the mainboard temperature gets to 43 44...posible when im playing even more...and then boom...RESTART.
whats going on....?anyone knows why?anyone knows the answer for this problem?

Rob Car Sep 15, 2005, 09:03am EDT Report Abuse
>> Re: HELP!!! ASUS A7N266-VM
Has anybody tried to install a Sempron 2200 (166MHz Clok, 9 Multi, 1.5Ghz Frequ.) on the ASUS A7N266-VM? The board does not support 166 FSB but I understand with the modding mentioned elsewhere in the forum I can free up the FSB and than select 166Mhz. The Bios should not recognize the CPU or maybe it might think it's an Athlon XP+ 1500. Who knows?

Any clue?

Duron 1200
512MB Mem
ATI FireGl8700

Milt Sep 16, 2005, 06:56pm EDT Report Abuse
>> Re: Help with ASUS A7N266-VM
Hi Rob Car,

The Asus A7N266-VM BIOS is set up to recognize CPUs based on what the multiplier of the equivalent T-bred would be.
So even with a Barton 2500+, running overclocked to 11 x 181 = 1995 MHz on my A7N266-VM, the Barton was only recognized as a 1700+ T-bred (because of the same 11x multiplier)
Here's a pic of it...
So God only knows what the 9x multi of your Sempron would come out as.
But it doesn't really matter at all, because that first POST screen is strictly 'cosmetic', and the CPU will run at whatever FSB you set it at.
But, your overclocking efforts will be limited to a max of 181.36 MHz... IOW, not very much.

My advice to you though would be to forget about the Sempron, and hunt down one of the Barton 'Mobiles', all of which run on a 133 MHz FSB with a correspondingly higher multiplier to compensate.

Here are my 'favourites' in the "133/266" MHz/DDR-FSB class... which is exactly what you need to start with on any PCChips M810L, M810D, M811LU, M825 v7.2A, Asus A7N266-VM or ECS K7S5A / M830

High budget: ~$105 - Barton 'Mobile' 3000+ on 1.65v Vcore
AXMA3000FKT4C Barton (L2 512K) 16.5x 133MHz=2200MHz

High budget: ~$117 - Barton 'DTR' (Desk Top Replacement) 2800+ on 1.50v Vcore
AXDA2800DKV4C Barton (L2=512K) 16.0x133MHz=2133MHz

Medium budget: ~$97 - Barton 'Mobile' 2600+ on 1.45v Vcore
AXMG2600FQQ4C Barton (L2 512K) 15.0x 133MHz=2000MHz

Medium budget: ~$85 - Barton 'Mobile' 2500+ on 1.45v Vcore
AXMH2500FQQ4C Barton (L2 512K) 14.0x 133MHz=1867MHz

Medium budget: ~$82 - Barton 'Mobile' 2400+ on 1.45v Vcore
AXMH2400FQQ4C Barton (L2 512K) 13.5x 133MHz=1800MHz

Medium budget: ~$82 - Barton 'Mobile' 2200+ on 1.35v Vcore
AXMD2200FJQ4C Barton (L2 512K) 12.5x 133MHz=1667MHz

Here's a link showing which 'Mobile' Socket 'A' CPUs, (and their CURRENT price), that Newegg actually has in stock, at the moment...;Go.y=29

All of the above are designed to run on a "133/266" MHz/DDR-FSB (Double Data Rate - Front Side Bus), all of them run quite cool (they are either designed for notebooks, or low Vcore, or both), so all of them are VERY overclockable.

Rob Car Sep 20, 2005, 04:23am EDT Report Abuse
>> Re: Help with ASUS A7N266-VM
Thanks for the hints but unfortunately I had already bought the Sempron 2200 and I will try that. BTW is there any prerequisite regarding the BIOS? I have 1008 Beta 1. Will it be OK or should I revert to 1005 first?

Any help appreciated.

chichi char Sep 20, 2005, 06:04am EDT Report Abuse
>> Re: Help with ASUS A7N266-VM - graphic card setting
I just bought the geforce fx 5500 for upgrading the graphic in my ASUS A7N266-VM, then my window has been crashing since then until i disable it in the bios. Is there a jumper i should set? If you have any idea, please let me know. Thank you guys!!!

Milt Sep 21, 2005, 04:00am EDT Report Abuse
>> Re: Help with ASUS A7N266-VM
@ Rob Car,
Here's a link to the 'hardware mod', which is now up to 24 pages, that allows you to enable up to 181 MHz FSB.
Somewhere in there it tells you which BIOS to use... I've forgotten, sorry.

@ chichi char,
It's possible that your PSU is a little too weak to run the new vid card.
What are the +3.3v, +5v, and +12v 'A' ratings, from the sticker on the side of your PSU?

Ignore the big "xxxW" wattage rating on yours, and look for the 'A' ratings, (Amps), AT LEAST AS HIGH as what is shown for the 400W version on the sample label below.

The *ABSOLUTE MINIMUMS*, recommended by the "AMD desktop builders guide", circa 2003, for any basic AMD XP processor setup, like an XP 1700+, a 'mid-range' (for 2003) vid card, one HD, and one CD-ROM are...
+3.3v = 28A
+5.0v = 30A
+12v = 15A

So even the 350W version (on the PSU label shown below) is woefully inadequate...
The 400W version of this PSU just barely meets AMD's recommended minimums on the +3.3v (28A), and +12v (15A) lines, and slightly exceeds it on the +5v (35A)

What's shown above is a 400W 'no-name' LPK2-30, (definitely 'Made in Thailand', and believed to be made by 'Linkworld')

And, it doesn't hurt anything in your computer to have lots more power available than what you actually need.

Rob Car Sep 28, 2005, 09:16am EDT Report Abuse
>> Re: Help with ASUS A7N266-VM
Thanks Milt,

I did the mod with the 3 jumper in order to revert back, just in case! I tried to use the Radeon I've been using with the Duron 1300 but to no avail. The OC doesn't work with Radeon. Only Nvidia cards can be used and I tried either the on board and a GeForce 4/MX (old stuff just to check). OC was stable, checked with Prime95, up to 177MHz (probably due to my Memory rated PC2400). Sempron 2200 was recognized as Athlon 1600 (9*177). I have always used BIOS 1008.001beta without problem. However, as I didn't want to buy a new video card, I decided to revert back to standard 133Mhz jumper mode where the ATI FireGL 8700 booted successfully (the AGP bus speed had to be set to 4x using ATITool as the board kept saying it was 1x. Maybe it's a bug of the latest Firegl unified driver i used). Now the Sempron 2200 is recognized as Athlon 1200 (9*133) and I'm back to where I started from but with a lot more knowledge. I don't know if the speed increase is significant versus the Duron 1300 but it should be (more cache, higher bus) even I thinks it cannot be so relevant.

BTW this was the PC of my 8 year-old daughter while my 12 year-old kid has an Athlon 2400 installed on a Asus A7N8X-X. Maybe it might make sense to install the Athlon 2400 on the ASUS A7N266-VM and the Sempron 2200 on the A7N8X-X and overclok the FSB on the A7N8X-X. I don't really know if it makes sense as the Athlon 2400 (133*15) has a standard speed of 2000Mhz while the Sempron 2200 (9*166) has a speed of 1500Mhz. I have to be sure my kid will no see it as a downgrade.

Any suggestions?

Milt Sep 28, 2005, 02:25pm EDT Report Abuse
>> Re: Help with ASUS A7N266-VM
Hi Rob,
As you found out, any Radeon card will 'kill' your 'new' OC feature... I believe that it knocks it right back to 100/100... I could be wrong.

The BIOS on this Asus was never designed to 'recognize' 166/333 CPUs, so it just goes by the multiplier.
My Barton 2500+, at 11 x 181.3 = 1995 MHz = XP 2700+ was 'recognized' as an Athlon 1700+ by the BIOS, (on the first POST screen), because of the identical 11.0x multi.
Pay no attention to the BIOS's 'guestimate'... it is strictly a 'cosmetic error'

I would put the 2400+ in the A7N266-VM, using the on-board, or any GeForce card, and clock it up in CMOS, as high as the CPU will allow, (which will be LESS than the 177 MHz of your memory)
Use the most aggressive memory timings you can, because the on-board vid relies totally on your System Memory's speed for it's speed, or lack of it.
The GeForce 4/MX is just a 're-badged' GeForce2, so your 3D Mark 2001 scores will be very similar, with either the on-board, or the GeForce 4/MX

Put the Sempron, and the Radeon, in the A7N8X, and clock it up as high as it can go, assuming you have PC3200, or better, in the A7N8X

Here's a screenshot of the best I did in 3D Mark 2001, using the on-board, and a XP 1700+, overclocked to 13.5 x 172 = 2320 MHz = XP2900+
I could probably do better than that now... note that with my PC2700 memory, I had to run it at "2.5-4-4CL" (in Sandra's Mainboard info, under "Bank 0 Setting" )

Rob Car Sep 29, 2005, 05:17am EDT Report Abuse
>> Re: Help with ASUS A7N266-VM
Thanks Milt

Last night I mess up the PC trying to transform the FireGL 8700 into a Radeo 8500. But I'm now back to where I saw. I didn't post correctly the configuration od the two PC I'm trying to improve.

1. ASUS A7N266-VM with Sempron 2200 (running at 9*133=1200) with Ati FireGl 8700 (Direct X 8.1) and 512 Mb Memory PC2400

2. ASUS A7N8X-X with Athlon 2400 (running at 15*133=2000) with Nvidia Geforce FX 5200 (Direct X 9.0) and 512 Mb Memory PC2700

By swapping the Sempron and the Ati into the A7N8X-X I will lose the Direct X compatibility with some game (they require it but I doubt they take advantage of it being such a slow card). I'm sure the Athlon and the FX5200 will work with the mod but I don't know how much FSB increase I can get using standard AMD CPU Cooler (166?). Both the onboard and Geforce4 MX are too old (Direct X 7.1 if I'm not wrong) and their performance under any game (my kids manly use Age of Mythology and Empire Earth) is abysmal even compared to the Ati FireFG 8700. Probably the only solution is to find a cheap video card or maybe to change the A7N266-VM altogether!

Milt Oct 03, 2005, 02:11am EDT Report Abuse
>> Re: Help with ASUS A7N266-VM

Alvin Delagon Nov 15, 2005, 06:43am EST Report Abuse
>> Re: Help with ASUS A7N266-VM
I need help again with this darn motherboard. My gf been using it for almost two years now and it keeps restarting at 55C. Just recently, we bought a a Coolermaster X-Dream 2 to cool it down but it got worse. The highest temp we reached with X-Dream was 50C but it keeps restarting a lot than it was last time. I replaced her PSU with 400W PSU and a new Memory but it keeps restarting! Darn!

It makes me wonder, is the built-in card broken? It freezes everytime it runs 3d apps. Please help me I'm desperate! >.<

Dave H Nov 15, 2005, 10:09am EST Report Abuse
>> Re: Help with ASUS A7N266-VM
have u tried reseting the setting in the bios, thats got me out of a few problems with that board.
also can i ask what memory u have been using


Alvin Delagon Nov 15, 2005, 11:05pm EST Report Abuse
>> Re: Help with ASUS A7N266-VM
Thanks for the heads up. She's using a generic 256DDR266 memory and it's been working well since. I did a memtest86+ of it. I even let her borrow my ram but no to avail. We'll try to reset the bios settings! Thanks again!

BTW, we would need a screw driver to short the reset jumper isn't it. Because as far as I know the motherboard don't have jumper pins only solder points! :-(

Domen Perc Nov 16, 2005, 05:41am EST Report Abuse
>> Re: Help with ASUS A7N266-VM
I have got problems with FSB clock. While I had Geforce 3 everything was ok, but when I replaced it with Radeon9600, my computer worked only with 100MHz FSB, but it should be 133MHz (Athlon 1800+). Now I replaced Radeon9600 with Radeon9800 pro but it did not help. In bios FSB is set to 133MHz, but it is really only 100MHz because it works with 1150MHz(100x11.5). I do not know what to do. Any ideas?

Milt Nov 16, 2005, 06:47pm EST Report Abuse
>> Re: Help with ASUS A7N266-VM
Hi Domen,
I thought this 'problem' with ATi cards in mt Asus A7N266-VM was only when I had it overclocked to, like 181 MHz
If I insert ANY ATi vid card, it knocks me right back, from 180+ MHz, to 100 MHz
But from your post above, this apparently happens even when running at 'stock' 133 MHz speeds.

The problem is either with the nForce chipset, or the BIOS designed for the A7N266-VM.
It would seem that the designers of this board have decided to make ANY ATi vid card 'look bad', in this mobo, no matter how well it performs in other boards.

Get a GeForce card in there, and your problem will be 'solved'

Robert Shores Nov 17, 2005, 12:52am EST Report Abuse
>> Re: Help with ASUS A7N266-VM
I am using an ATI RADEON 9000 SERIES card and according to WCUPID, it is running at 133mhz. I have both jumpers on the motherboard set to 133mhz.[

Domen Perc Nov 17, 2005, 01:18am EST Report Abuse
>> Re: Help with ASUS A7N266-VM
I found out that FSB is lower because AGP speed is 1x, but it should be 4x, so when I put Radeon in my motherboard it is automatically set to 1x. Anybody know where could I change agp speed? I think that that happens because graphic gard supports 8x agp and motherboard does not.

Robert Shores Nov 17, 2005, 02:14am EST Report Abuse
>> Re: Help with ASUS A7N266-VM
My AGP is set to 2X. Right click on desktop, then properties,settings, ADVANCED, and the ATI INTERFACE settings should show up. On mine there is a tab called SMARTGATH that will test for the best AGP setting. If you set it too high the system will become unstable.

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