JETWAY 993BN, User Manual

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6
Before using your computer, you must follow the steps as follows:
1. Set Jumpers on the Mainboard
2. Install the CPU
3. Install DRAM Modules
4. Install Expansion card
5. Connect Cables, Wires, and Power Supply
2-5 Jumper Settings
1. CPU Bus Frequency Selection :
JP9
JP9
1 3
•
Users also can setting the CPU Bus frequency in the “CPU Host/PCI clock” in
CHIPSET FEATURES SETUP.(Please refer to page 18)
* When you are running at 133MHz , make sure all of your PCI devices have enough
tolerance to run on 44MHz . Otherwise, it may cause your system become very
unstable.
2. CPU Ratio Selector
：
U21
Ratio 1 2 3 4 Ratio 1 2 3 4
3.0x ON OFF ON ON 5.5x OFF OFF OFF ON
3.5x OFF OFF ON ON 6.0x ON ON ON OFF
4.0x ON ON OFF ON 6.5x OFF ON ON OFF
4.5x OFF ON OFF ON 7.0x ON OFF ON OFF
5.0x ON OFF OFF ON 7.5x OFF OFF ON OFF
8.0x ON ON OFF OFF
Table for the Pentium III and Celeron Socket 370 CPU
Celeron Pentium III
Speed Bus Ratio Speed Bus Ratio
300/66 66MHz 4.5x 500E/100 100MHz 5.0x
333/66 66MHz 5.0x 550E/100 100MHz 5.5x
366/66 66MHz 5.5x 600E/100 100MHz 6.0x
400/66 66MHz 6.0x 650E/100 100MHz 6.5x
466/66 66MHz 7.0x 700/100 100MHz 7.0x
500/66 66MHz 7.5x 750/100 100MHz 7.5x
533/66 66MHz 8.0x 800/100 100MHz 8.0x
533A/66 66MHz 8.0x 850/100 100MHz 8.5x
566/66 66MHz 8.5x
600/66 66MHz 9.0x
633/66 66MHz 9.5x
667/66 66MHz 10.0x
700/66 66MHz 10.5x
733/66 66MHz 11.0x
766/66 66MHz 11.5x
∗
Because the Ratio are fixed by CPU Manufacture, users don’t need
to setting ratio any more, this table just for reference use .
2. CMOS RAM Clear: JP11 (Yellow color selector)
CPU External Frequency
：
JP9
CPU JP9 BIOS Seting
66MHz 2-3 Default
100MHz 1-2 Default
133MHz* 1-2 Select by BIOS setting
*Your Memory must meet the requirement to run over 100MHz.