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  A7N8X Deluxe and Athlon XP 2500+ Problem 
 
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Derek Seltzer Apr 07, 2003, 12:37pm EDT Report Abuse
Hey everyone, got a problem here that is killing. I just upgraded my computer and I now use an ASUS A7N8X Deluxe motherboard, I finally got it set up with everything working great, then I tried to upgrade my process from a 1.2 ghz Athlon to an Athlon XP 2500+ (333 FSB) @ 1.83 ghz. Everything worked fine with my 1.2 athlon but now I keep getting the post message "CPU failed due to overclocking" In my bios (in bios version 1003) my CPU Ex Frequency is set to 166 to give me the 333 FSB and my multiple was set to 11x like it should be... however for some reason when my computer restarts it shows it as a Athlon XP at 1100 mhz. This is about 700 mhz off, and I can't get it to go up any higher. Even after it recognizes the 1100 it stops with an error on startup about the overclocking. Any ideas as to what might cause this? My memory is generic 512MB PC3200 memory which worked great with my previous 1.2 ghz Athlon. In bios my mem is set to a frequency of 133. Anybody willing to help me out here?


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ant decto Apr 07, 2003, 12:52pm EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
I think the memory needs to run at a minimum of 166 FSB as well. If you have PC3200 (DDR400) memory then it should be running at 200FSB.


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Derek Seltzer Apr 07, 2003, 01:16pm EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
Yes, I have PC3200 (400), so I should set the memory to 200?

Derek Seltzer Apr 07, 2003, 01:20pm EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
I tried it, and I tell you it sure didn't like it... it gave me loud beeps after saying "System Failed Memory Test" :( Any other suggestions as to what it could be?

ant decto Apr 07, 2003, 02:36pm EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
If you're memory won't run at 200, clock the memory back to 166.
Is there a jumper on the mobo to reset the BIOS?
You might need to clear the BIOS to correctly detect the new CPU
Will the XP2500 run at 133 x 11 if you set it manually?
With some mobo's you need to change the divider to 1/5 to run at 166FSB. 1/4 @ 133FSB. 1/3 100FSB

Regards
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Derek Seltzer Apr 07, 2003, 03:30pm EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
No it wouldn't run at 133 x 11
I'm not sure I was following you on that last line of yours.. what were the 1/5 and 1/4 dividers you were talking about? I've already cleared the bios a couple times.

Derek Seltzer Apr 08, 2003, 08:27am EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
Tried more settings last night with no luck, I still can't get it to boot all the way... and it is still being recognized as 1100 megahertz instead of 1833. :(
HELP! Please :)

J T Apr 08, 2003, 12:31pm EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
You need to flip the jumper on the mobo for FSB. It is labelled CPU_FSB and needs to be set to FSB333/266, not FSB200. I believe it is pins 1-2 that need to be jumpered. As the manual indicates, if it is set to FSB200, the board will only support that speed, which is exactly what you are describing.

Then, you should make sure the BIOS is set right. External frequency should be set to 166, CPU multiple and other settings on AUTO. I would set memory frequency to SYNC for best performance. It will run the memory at 333, but you will get slightly better performance due to the synchronization with the FSB.

This should do it for ya.

Brian Everding Jul 23, 2003, 01:18am EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
I'm having the same issue, with exactly the same hardware. Switching the jumper between 200 and 266/333 produces the smallest difference. Instead of claiming it's a Athlon XP 1100 it says it's a 1150 with the 200 jumper setting. It seems like with the 200 jumper setting it listens to the multiplier, while without it stays at 1100. The performance at this setting sucks! I've upgraded my bios to 1.04, and still no love.

Has anyone encountered this problem and solved it?

Cyrus L. Jul 23, 2003, 04:01pm EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
okay...first, change ur voltage to 12.5 (standard)..then for your CPU Frequency and FSB, change it to manual so you will get more choices for overclocking. If you want the normal 2500+ speed, change it to 133Mhz, it will give you about 1.87Ghz, if you clock it to 160Mhz like i have, it will show up as an XP2800+..let me know if tihs helps. IF yes, that's great, if not, email me or reply and i'll go through it step my step with you.

Cyrus

Scott Kelly Sep 18, 2003, 12:58am EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
Memory Failures

I have a new angle on the 'system failed memory' test problem.

My system gave me same error message and subsequent test with
Memtest86 confirmed bad Corsair memory. I replaced the memory
and the error messages went away. Well, almost. I have discovered
that if I use the Pause key during boot system can be induced to
cry memory error almost every time.

Maybe some of the error messages that others are getting are also
a mix of real errors and some kind of software 'flaw' in bios.

Anyway, would someone else please try to pause during boot ( do it
a bunch of times ) and see if they can produce the error message.

Let me know,

Scott

Ryan Monument Oct 26, 2003, 01:04am EDT Report Abuse
>> Re: A7N8X Deluxe and Athlon XP 2500 Problem
Not sure if this is the solution to this issue, but I'm using an A7V8X board with the XP 2500. The only way to get full functionality from the XP 2500 on my board is to use it with PC2700 DDR.

The same applies to any CPU that uses the 333 FSB on this board. I imagine the A7N8X is similar.

A bit late, but hope it helps.



 

    
 
 

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