Athlon 2800+ unstable

I experience random boots with my system. When running at default
speed 166*12,5 the system will boot aprox. every 10 minutes. The only
way I have got it stabilized is to underclock the system. It seems to
be stable around 100*12,5

The Award Bios emits periodic high/low beeps at boot. This seem to
indicate CPU error causing boot ? I have run the memtest program and
this turned out OK. When ran at 166*12,5 the PRIME95 program will boot
the system at once when i run the Benchmark test. When underclocked to
1,25 GHz, the PRIME95 test is fine.

My system:
- abit NF7-s 2.0 Socket A, NForce2, Ultra 400
- AMD Athlon XP 2800+ 2.075 GHz, 333Mhz
- Aopen cabinet with 350 W power supply
- Sapphire Radeon 9200 Atlantis 128 MB ViVO
- Thermaltake VOLCANO 11 Xaser

At boot the temperatures seems to be fine (around 47 degrees Celcius
at CPU) Dont think this is a heat problem.

May be a defect CPU, or can it be the CPU to RAM interface (even
though the memtest seemed OK?)

Anybody else has experienced something like this ?

TTJ wrote:

> Anybody else has experienced something like this ?
>

Yeah I had this problem. I fixed it by making the RAM speed the same as the
BUS speed.

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"." <> wrote in message news:<Xns95A71293D86F2dotspothotpopcom@130.133.1.4 >...
> TTJ wrote:
>
> > Anybody else has experienced something like this ?
> >
>
> Yeah I had this problem. I fixed it by making the RAM speed the same as the
> BUS speed.

Thank you very much for a quick reply.

Do I set the RAM speed setting by using BIOS ?