I've just installed the 2600/333, It's running @2250/ 180fsb stable, have had up to 195fsb but not stable enough for some games yet, Have ordered newer samsung 2xsamsung 512's level II (2700), current original 256 samsung 2700x2. This may help even higher cpu overclocking, YES this board supports 2600/2700 & well beyond. AMD's barton chip looks to be @ 333 with 512 cache, & 3gig wow, not sure about this, I don't think any body knows where amd's going , But i'm waiting to see