Well tried 270 last night even at 3-4-4-8 and it was a no go but I didn't expect it. Still pretty sweet that they'll do 260mhz+ at CAS 2.5. I'm still playing around with my CPU as I'm at 2.7Ghz right now (300x9). We'll see if it does any more. Either way I'll probably play around with the RAM some more to see how high in the 260s it will go.