Re: Which socket shiould i use?
both of those sockets are for amd cpus. AM2 is the newest one, so I'd go with that. The cpus are about the same price, but AM2 mobos are probably a little more expensive than 939 mobos.
Or then u could go with intel and socket LGA 775. The new intel cpus are great.
Don't have any time now, someone can explain more to u. But those are the only sockets that u should be thinking about, everything else is too old.