I bought a stick of Kingston DDR2100 from a friend to add to my system. I run a 1.4 TBird at 1.6, using a stick of Crucial DDR2100 (CAS of 2.5) with a FSB of 145. After adding the Kingston stick, my system reboots every 20 min or so. Even putting the FSB back to 133, it still reboots with the Kinston in. I went back to my friend to get my money back, but he claims I damaged his stick. He informs me that the Kingston memory has a CAS of 3, and running it at that speed with the Crucial memory damaged it. I think this is BS. What do you guys think?