Go to www.mushkin.com Mushkin makes a very good product and has info on what there ram works on concerning AMD and others. I have dealt with them and they are honest and will tell you what you can get by with. By the way, CAS2 vs CAS3 differs by the number of cycles your processor must visti the ram before it is satisfied. In other words, your CAS2 will only be accessed (column/rows) 2 times where CAS3 requires 3 trips. ie: 33%more time required for CAS3. Here is where you gain performance. Where can you get 33% improvement for the difference in $Cost between CAS2 and CAS3? _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com The NOSPIN Group provides a monthly newsletter with great tips, information and ideas: NOSPIN-L, The NOSPIN Magazine Visit our web site to signup: http://freepctech.com