OldFartJAC wrote:
What is the beep code it gives you on POST?

He mentions, three times, in his post that it's a "CPU error" beep code


The first thing I would look at is the voltage regulator capacitors. My
guess would be that the X800 is drawing more than the 9800 and the CPU isn't
getting a good stable voltage supply due to a failed filtering cap. These
are the usual culprit when higher-powered degrade over time, but lower-power
ones still work fine. See if the top is bulging or if there's a small hole
in the top of any of the motherboard or video card capacitors. The big ones
are usually the ones to go

Sticking a POST-code reading card in your computer would give you more
detailed information on where it's failing, but it's not exactly like
everyone has one of those in their spare-bits box. Another thing to try is
to heavily underclock the CPU. Using the 9800, set the multiplier and HT
speeds as low as possible. This will lighten the load on the voltage
regulators a lot. Essentially wind everything down to the slowest possible
settings in the BIOS using the 9800, then slowly increase things again until
it breaks with the X800.

Finally, try not connecting the HDD power cables to the X800. It should
still boot and warn you about your "mistake", and will possibly lower the
draw from the PSU (though may increase the draw from the M/B, not entirely
sure). However, since the X800Pro has a lower total power usage than the
9800Pro (IIRC), I'd be surprised if it's PSU issues.

[...]

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Michael Brown
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