From my understanding the FSB on the X2 4400+ is supposed to be 1000mhz. I have a Asus A8N SLI motherboard and it is reading at 800mhz. I have been in the BIOS and tried to see if anything inside will help and it increases the CPU speed as well which I am not trying to do yet. All I want to do is have the FSB where it is supposed to be. Thanks in advance for any advice.