Thought i better post this to get it off my mind as its got me pretty wound up. Had to RMA my MSI Nforce680i based on nvidias reference board just with a MSI seriel number. Now with that board with its original bios i had my E6600 running at 3400ghz, bios was awesome and had no problems until the dreaded C1 error. Now i got a replacement board being the Asus Striker Extreme 680i, which i thought would be significantly better as the cost was £80 more than my board when new, but the board seems rubbish! with all the fiddling and advice i have seen on here i can not get my cpu stable above 3000ghz, bios is a pain, i mean you need a calculater just to work out what speed your CPU will clock at! NB gets about 10-20 degrees hotter than my old board and does not play nicely with my RAM! all this when the board is supposed to be better, just shows priciest is not always best, if anyone really is still dumb enough to go for 680i board please go for a reference board and dont pay the premium. Never will i buy or take as a replacement an extreme board again, shame on you Asus i always held you in great esteem. Venting over for now

maybe i just got a duff board but i do highly doubt it as eveyone seems to only have bad things to say about this board. And to all the people that seem to think the newer boards are any better, well look back to two years ago and this forum was raving on about the 680i chipset how well it overclocked and all that rubbish, its the reason i bought one.
...as for the post above if your sig is correct than it cant be the same board, this one can go above 330 just dont go much higher or you going to run into problems.From now on i will buy the cheapest model of a chipset as long as it is not Asrock.