Warning:
Overclocking
is not recommended by Chaintech.
The
information provided is
for reference only.
Pros and Cons of Overclocking:
1. Q: What is overclocking?
A: To operate beyond the related peripheral’s specification.
2. Q: Which is overclockable?
A: 1.
CPU:
two ways to overclock CPU -- by FSB and
clock ratio.FSB
(Front Side Bus): FSB is 66MHz, 100MHz, 133MHz
etc.
It’s the working frequency between CPU and SDRAM.Clock
Ratio: x2.5, x3.0, x3.5 etc.Intel CPU 600MHz means 100MHz
FSB X 6.0 clock ratio
Recently, all Intel CPU’s clock ration has
been
locked. The only
way to overclock CPU isto adjust FSB.(You
may heard 83 FSB which is raised from 66 FSB.)
While other M/B makers may still do
leaping adjustment for FSB --
namely 66 --->75, 83,
100 --> 125 etc.
Chaintech has pioneered with
linear adjustment for FSB
which
allows the user to adjust FSB at
every
1 MHz.
A: 2.
DRAM:
Normally,
the working frequency of DRAM is equal to FSB.
Recently,chipset
makers provide chipsets with working frequency
not synchronous to FSB. Intel 810, DRAM working frequency =
2/3 x FSB,if FSB is between 66 and 100MHz.
DRAM working
frequency = FSB,
if FSB is over 100MHz.
A: 3.
AGP:
Normally,
the working frequency of AGP is 66MHz.
However, the
working frequency of
AGP may be altered depending on chipset
and CPU.
Intel
BX chipset, AGP working frequency = FSB, if FSB is between
66 and
100MHz.
AGP working frequency = 2/3 x FSB, if FSB is above
100MHz.
So, AGP working frequency is about 88 MHz if FSB is 133 MHz.
Many
AGP cards fail at overclocking due to AGP chipsets can’t
support at higher
frequency.
Please refer to Tom’s Hardware Guide’s website
for more information
about AGP overclocking
comparison--- www.tomshardware.com
A:4.
PCI/IDE:
Currently,
the working frequency of PCI is 33MHz.
Intel
BX chipset,
PCI/IDE working frequency = 1/2 x FSB, if FSB is between 66 and
100MHz.
PCI/IDE
working frequency = 1/3 x FSB, if FSB is above
100MHz.
3.
Q: How to determine if the M/B is overclockable?
A: There is one IC (clock generator) onboard to
generate all the
working
frequencies. If the
clock generator can’t provide the right
frequencies for the peripherals, then the overclocking is
unlikely to
succeed.
4.
Q: How to overclock?
A:
Normally, there are DIP switches or jumpers on
M/B to adjust
FSB. However, since Intel mass production CPU all with
clock
ratio locked, some M/B makers may remove DIP switches and
jumpers to
limit the capability to adjust FSB as well.
5.Q: How come I cannot overclock?
A: Some factors have to be taken consideration.
Does the clock gen.
(clock generator) support
all the overclocking frequencies?
Do the
peripherals sustain the higher
frequencies than normal
situations? (PCI
40MHz, AGP 88MHz etc.)
6.Q: What can I do if I can’t overclock?
A:
1. Replace a better AGP card.
2. Adjust CPU voltage.
3. Replace better DRAMs
or change DRAM timing.
7.Q: What questions should I ask to the M/B
or add-on
card
makers for overclocking
to 133MHz?
A:
1. Does the clock gen. provide FSB/4 for PCI?
2. Does AGP survive at 88MHz?
3. PC133 DRAM?
4. Is it a new Slocket for Coppermine?
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