well im not gonna comment on mikes answers...he is always right.
but just so you know im running a duron 800@1000 @1.6 (1.65 on k7t pro2-a)
im not sure what week the chip is, but i know thats not much voltage so its a rare one. it is perfectly stable too...prime95'ed it for 2 days, and immediately after that was finished i ran 3dmark2000 for at least 3 hours, then played some Q3A and it never crashed. my running temps with an alpha pal6035 w/ delta are:
idle: 23 celcius
full load: 29 celcius
this seems unbelieveable, but you havnt seen my cooling setup =)
3 120mm fans, 2 blowing air in and 1 out, 4 80mm sunon fans for exhaust, and 4 20mm's blowing on my HDD
ive got roughly 270cfm in...250cfm out