JETWAY 993AN, User Manual

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6
2-4 Installation Steps
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 :
JP12, JP11
CO
M2
JP11
JP12
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)
2. CPU Ratio Selector
：
U18
Ratio 1 2 3 4 Ratio 1 2 3 4
2.0x ON ON ON ON 5.5x OFF OFF OFF ON
2.5x OFF ON ON ON 6.0x ON ON ON OFF
3.0x ON OFF ON ON 6.5x OFF ON ON OFF
3.5x OFF OFF ON ON 7.0x ON OFF ON OFF
4.0x ON ON OFF ON 7.5x OFF OFF ON OFF
4.5x OFF ON OFF ON 8.0x ON ON OFF OFF
5.0x ON OFF OFF ON
Table for the Pentium III and Celeron Socket 370 CPU
Celeron Pentium III Pentium III
Speed Bus Ratio Speed Bus Ratio Speed Bus Ratio
300/66 66MHz 4.5x 500E/100 100MHz 5.0x 733/133 133MHz 5.5x
333/66 66MHz 5.0x 533EB/133 133MHz 4.0x 750/100 100MHz 7.5x
366/66 66MHz 5.5x 550E/100 100MHz 5.5x 800/100 100MHz 8.0x
400/66 66MHz 6.0x 600E/100 100MHz 6.0x 800EB/133 133MHz 6.0x
466/66 66MHz 7.0x 600EB/133 133MHz 4.5x 850/100 100MHz 8.5x
500/66 66MHz 7.5x 650/100 100MHz 6.5x 866/133 133MHz 6.5x
533/66 66MHz 8.0x 667/133 133MHz 5.0x 933/133 133MHz 7.0x
533A/66 66MHz 8.0x 700/100 100MHz 7.0x 1.0GHz/133 133MHz 7.5x
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 .
CPU External Frequency
：
JP12, JP11
CPU JP12 JP11 BIOS Setting
66MHz 2-3 ON Default
100MHz 1-2 ON Default
133MHz* 1-2 OFF Default
150MHz* 1-2 OFF 150MHz
∗
Your Memory must meet the requirement to run on 133MHz or 150MHz
condition. In order to run 150MHz, Please set jumper at 133MHz condition and
then change the setting to 150MHz from the BIOS.