I have written a similar post in the motherboards section and got a fairly useful relpy, but I am still unsure if i have maxed out my overclock or if there is still some room to push. So I thought i'd look for a second opinion. I have a Asus A8N-SLi premium, an Opt 144 and 2x1gig of XMS3500LL. I am currently hitting a ceiling of 2.6ghz at 9x289 with a 166 divider and x3 HTT multi. I know from trial and error that the ram can cope at 250 easily enough and the processor is currently both prime and superpi 32m stable, so I figure it can go at least a bit further. Temps are low too. However if I push the HTT from 289 to 290 it just won't boot. I can get back to the set up but not to windows. I am guessing that it's the motherboard that has hit its limit but I am not sure. I have heard of people getting 300+ fairly regularly so I am wondering if there is a setting or a BIOS revision that lets you go further. Thanks for the help.