To all, Many motherboards allow you to set the External Clock in the Bios settings so that you can have 66, 75, 85 100 and 133 bus speeds. Is this the bus speed for the cpu only, or does this also set bus speed for PCI and ISA slots too? In order for a motherboard to have PCI and ISA slots running at 100 mhz doesn't it have to have what is called 100mhz "front side bus" capabilities? What exactly is meant by the term "front side bus"? Thanx Bill McMilleon, Sr. Read the Word [log in to unmask] Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://nospin.com - http://nospin.org