>>So, you should be able to test this by de-tuning your system, using bios
>>settings or motherboard jumpers. simplest test is to reduce front side
>>from 100MHz down to 66MHz, then compile a kernel. if that fails, then
>>something (mobo,cpu,ram) is seriously bad. otherwise, raise fsb and
>>test again until you find lower limit of failure. at that point, you can
>>diagnose further, if you want, by swapping parts and adjusting bios
>>since you've already swapped cpu + ram, i suspect something in your bios
>>chipset settings might be the problem... bios probably has a 'fail-safe'
>>option - try that first!
> I declocked an AMD K6-2 500 down to 338 and it seemed to work. That's
> strange that neither a 500 mhz or a 450 mhz AMD K6-2 chip will compile
> a kernel at its rated speed. I'm thinking about putting a 533mhz K6-2
> chip in there and clock it down to 500. With all this talk about
> overclocking it seems sad I have to underclock to compile anything.
you shouldn't "have to" declock.
detuning is only a diagnostic method.
detuning is a test to prove that the failure is hardware and not software.
if it fails, running at full rated speed, only when compiling a kernel, it
is because nothing else you normally do places those kinds of demands on
the hardware. nothing much stresses a machine like a kernel compile does.
depending on your requirements, the system is either
broken or marginally adequate.
in my (limited) experience, these failures have almost always been due to
marginal ram, never due to a cpu running at full rated speed.
it might also be due to overoptimistic settings in chipset BIOS, or maybe
a marginal powersupply. but i suspect marginal PC-100 ram ...
detune yer BIOS first, at full rated speed, before trying de-clocking !
after that, by trying different combinations of FSB and multiplier, you can
isolate the failure somewhat. you reduced fsb from 100 to 66. does your
mobo offer 95, 83, 75 too? does it fail at all those speeds, too? (if my
hunch is right, then it should work at fsb=95 and mult=5.0).
i've had good luck with amd K6. I can't overclock them (or anything else)
very far, but i do find them reliable at their rated spec.
hoping this helps,
William Hunt, Portland Oregon USA