I just recieved my kk266R from newegg.com and I have some problems with this board. I have a 1000 mhz Tbird(not AXIA)which is 100 x 10. When I tried to change it to 100 x 11, it will post 800mhz, why? ( I already updated to the latest BIOS) I decided to change the Mutiplier around but it will not boot up at (x6, x6.5, x7, x7.5, x9, x9,5), it only worked correct during (x8, x8.5, x10, x10.5). I have not tried anything higher than x15, please help me with some suggestions. I ordered two boards and I tried on both and both of them have same problem.