I had gentoo 2005.0 on an old duron 1000Mhz and it worked fine. It was connected to my local network through a Wireless Netgear WG311v2 using the acx driver.
I needed to reinstall the system from scratch but the new system behaves strangely. It seems that it hungs sometimes when I am using emerge. The way it hungs is totally random but it eventually occurs after 10-15 mins. If I am not working online it might go on for hours. I tried the newer version of Gentoo with no luck. I tried using ndiswrapper instead of acx. Ndis with WinXP inf file produced random kernel panics & with win2000 inf file it behaved exactly like acx (random freezes).
By freezing I mean not being able to do anything on the system. I tried to use top and wait for a freeze. I noticed high load average, but not a process occuping lot % cpu. I also noticed that while frozen there were processes that were swaping in my top list. Finally I noticed that the swap was not used at all.
My guess is that I am doing something different since the original install (though I cant remember what), or the my hardware has problems. Possible memory problem (currently doing a memtest86) or cpu failures. It is definantly not a temperature issue.