I've pulled 950 from a 566cel. Stable. fsb at 112. I haven't gone any higher than 1.85 on the core. It was fine. I was able to run 115 fsb at 1.85 but no stability. I've had "the fear" about going higher on the core. Bud, I would LOVE to hit that 1 gig mark just to do it. I'm guessing you took the risk and jumped your core up. Is that it? I know it's the combo of (among other things) fsb AND core. Is that how you did it. I also know I'm at the edge. I'm using air cooling, case mods to get air from the side panel onto the cpu. Generic cpu fan. you've been there. Your opinion, can the chip take more?