i asked this very same question a month ago on this community, but got no responce. i have, however recieved some info from a the french msi headquarters, they say that an 850 tbird is ok, and up to a 1ghz athlon. AMD says just the 800 (orig. athlon) is offically supported for this board. What bugs me is that on the msi website, they state that their board supports both the 1ghz tbird and athlon with the latest bios update. but when looking at the actual bios update download page, only the 950mhz is supported. strange i'd say. i want to put in a ghz tbird on my board but haven't found any site that has benchmarks or verifications of this happening.