Download directly for more content description... TS-USL3 Family Motherboard. Supporting Intel. Pentium. III/Celeron Series Processor. 66/100 . This User's Manual is designed to help end users and system . Supporting Intel Pentium III/Celeron Series Processor 66/100/133MHz Front Side Bus Intel 815E Chipset Welcome !!Congratulations on your purchase of this great value motherboard, with its range of specialfeatures and innovative onboard functions built around the advanced architecture of the newIntel 815E Chipset. More details follow later in this manual. You’ll find plenty ofinteresting information about this and many other quality Transcend products. Your User’s ManualThis User’s Manual is designed to help end users and system manufacturers to setup and installthe motherboard. All of the information within has been carefully checked for accuracy. However, Transcend Information, Inc. carries no responsibility orliability for any errors or inaccuracies which this manual may contain. This includes references toproducts and software. In addition, the information and specifications are subject to changewithout prior notice... The JP4 Jumper allows you to set the FSB (Front Side Bus) to 66/100/133MHz configuration. When the Jumper is set to "Auto", the freqency range depends on your CPU type. When you set the FSB to 66MHz, you can select a system bus frequency from 66MHz to 99MHz through "CPU Host/PCI Clock" of  "Frequency/Voltage Control" in the BIOS Setup menu. When you set the FSB to 100MHz, you can select a system bus frequency from 100MHz to 132MHz . When you set the FSB to 133MHz, you can select a system bus frequency from 133MHz to 166MHz .