I'm getting my spare P4 ready for sale, it's in quite crappy condition but works, it's a gourmet in tastes of RAM, though, I keep getting POST beeps with all of my PC-133/100 sticks. I'm gonna take Q-tips, dip 'em in rubbing alcohol, and rub them over the RAM stick's contacts, then stick them in the slot to see if it cleans anything off.