Motherboard not recognizing cpu

[Rifterion]

If you have any idea please help.

I just picked up the A7N8X (not deluxe) motherboard and an AthlonXP 2100+ Rev. B cpu. On boot, the post shows my cpu is an AthlonXP 1500+. As a test, I grabbed a friend's AthlonXP 1700+ and threw it in. The boot-up post said it was an 1100+. Putting it back in my friend's machine revealed that it was still a 1700+.

If I let it sit there for a minute, the bios finds the ide devices, pauses for a while, then displays that the cpu has been changed.

It finds the memory just fine.

There is an option in bios called the CPU External Frequency, which as described by the manual is usually 2 times the fsb. Thinking this was linked to the cpu fsb (which is 266) I changed the value from 100 to 133. After a reboot, there was no change in the cpu post and the value had changed itself back to 100. I don't know whether this might help me or not, I just started looking for things that might work.

Any idea what is going on? Each cpu was decremented by 600 on the Athlon cpu scale. Is this just a bad motherboard that I should rma? I'm pretty sure the cpu_fsb jumper is set correctly.

 

[Iron Woode]

Not knowing for sure if your board supports it, my EPOX board has a jumper that sets the CPU bus speed to 100 or 133 or higher. If your board has the same jumper, set it for the higher bus speeds.

Ok I just checked your board's jumpers. Near the northbridge there is a jumper. Make sure you jumper pins 1&2. Since the jumper is verticle you need to jumper the top 2 pins.

Make sure your bus is set to 133 (266) and see if things are better.

 

[Rifterion]

Ah ha, I found it, everything works great now. thanks

the bios is a bit tricky in the ways that it saves things. I had been reading the a7n8x thread and they mentioned that you should save the bios before exitting, which I did. But when I left, I exitted without saving changes (assuming I already had) and it discarded the changes I had made. Saving on exit didn't seem to give me and problems as it had others on the thread.

And now everything works and life is good