11
On the surface of the CPU as shown on the right picture, under the word of
“PENTIUM III” the code is:
RB 80526 P2 866 256
RB :
FC–PGA packing
P2 :
P2–133MHz front side bus frequency
PY–100MHz front side bus frequency
866 :
CPU internal frequency, where here is
866MHz
256 :
the size of L2 cache, where here is 256K
Celeron FC–PGA
On the surface of the CPU as shown on the right picture, under the word of “Celeron” the
code is:
566/128/66/1.5V
566 :
CPU internal frequency, where here is 566MHz
128 :
the size of L2 cache, where here is 128K
66 :
front side bus frequency, where here is 66MHz
1.5V :
the voltage for the CPU
2-3-2 Setting CPU Bus Clock & Memory Clock Jumper
Setting the front side bus frequency and SDRAM frequency
The motherboard uses jumper
JS1, JS2, JS3
and
JS4
for the front side bus frequency
and SDRAM frequency setting as shown from the table below:
CPU/SDRAM (MHz)
JS1
JS2
JS3
JS4
AUTO
ON
ON
1-2
1-2
66/100
(Default)
OFF OFF 2-3 2-3
100/100 OFF
OFF
2-3
1-2
133/100 OFF
OFF
1-2
1-2
133/133 OFF
OFF
1-2
2-3
Example: Using a Pentium
III 866 CPU with front side bus frequency of 133MHz and
PC-133 SDRAM module, the setting of JS3 will be 1-2 and JS4 will be 2-3.
This sets both CPU BUS CLOCK and SDRAM CLOCK to be 133MHz.
For experience user looking for over clocking possibility, please refer to sec 2-3-4.
2-3-3 Install CPU
