User Guide
22
Tip: When you fail to over-clock, you could:
1. Clear CMOS (JP14) to restore the default setting.
2. After turnin
g
p
ower on
,
p
ress
“Home
”
immediatel
y
until the screen a
pp
ears.
3.3 Other Installation for Your Reference
Setting CPU Voltage and Frequency
Setting CPU Core Voltage
This motherboard supports Voltage ID (VID) function to detect CPU voltage
automatically during power-on.
Setting CPU Frequency
i975Xz-YDG is CPU jumper-less design, you can set CPU frequency through 1MHz
stepping CPU Overclocking in the BIOS. CPU Core Frequency = CPU external
frequency x CPU Ratio. However, all CPU now selling in the market belong to
"Fixed Multiplier". That means users can not adjust the CPU Ratio but only change
CPU FSB clock to achieve overclocking.
(Users do the overclocking at their own risk!!)
BIOS Setup > Frequency / Voltage Control > CPU Bus Frequency
Processor
Number
Architecture
Clock
Speed
Front
Side Bus
Cache
Ratio
Core Duo T2700 65nm 2.33GHz
667MHz 2MB L2
14
Core Duo T2600 65nm 2.16GHz
667MHz 2MB L2
13
Core Duo T2500 65nm 2GHz 667MHz 2MB L2
12
Core Duo T2400 65nm 1.83GHz
667MHz 2MB L2
11
Core Duo T2300 65nm 1.66GHz
667MHz 2MB L2
10
Core Solo T1400 65nm 1.83GHz
667MHz 2MB L2
11
Core Solo T1300 65nm 1.66GHz
667MHz 2MB L2
10
Note: With CPU speed changing rapidly, there might be faster CPU on the market by the
time you received this installation guide. This table is kindly for your references only.
Warning: Intel 975X chipset support maximum 667MHz (166MHz*4) system
bus; higher clock setting may cause serious system damage.