I just replaced my old CPU, an Athlon Thunderbird 1GHZ (I fried it), with a 1.13GHZ Athlon Thunderbird, but the new one has a 266MHz FSB and my motherboard (a ASUS A7V KT133)only reads it as 850MHz. I looked on the chip and it says it is a 1133MHz processor. I'm not sure what's wrong...should I return the processor or is the speed slower because my motherboard's FSB is too slow?