"Not long ago, PC-66 was king of the high performance pc market. Those days are long gone. With the recent introduction of Rambus and DDR, the RAM market is wide open. In this article, let's focus on what seems to be the "status quo" of memory in the pc's of today. PC-100 and PC-133."
FULL STORY @ PCMECH (http://www.pcmech.com/reviews/review.htm?pc133sdram)