I ask cause I will have 2 sticks of this in my new duallie CAD workstation and I am finding that most sticks even including ones for 250-350 for 1gb so a total of 500 to 700 dollars on ram are using spec'd at cas 3.....These are all in dual kits so does that have something to do with it??? It is non EC as the mobos I am looking at do not require ECC memory. ONce you get past PC2700 these 1gb modules seem to stop showing cas 2 rating.....