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Increase FSB or CPU Multiplier

Overclocking & Computer Modification


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  #1  
Old 27-06-2009
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Join Date: Jun 2009
Posts: 5
Increase FSB or CPU Multiplier

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hi ,
i have started overclocking but terms FSB and Multiplier is just confusing to me is that need to increase FSB with low level CPU Multiplier also how to set SetFSB command line in order to increase the FSB ? please help me regarding
thank you.

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  #2  
Old 27-06-2009
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Join Date: Aug 2007
Posts: 1,098
Re: Increase FSB or CPU Multiplier

You can use SetFSB. SetFSB allows to change your computer's Front Side Bus (FSB) speed.

List of supported board, please see Authors homepage for more details if needed:

Intel
440BX
8xx
9xx
G33/P35/X38/X58
5000X/5400X
US15W

ATI
Xpress 3200 Intel
Xpress X1200 [RS690M]
RADEON IGP320
RADEON IGP350[ALI M1533]

AMD
AMD-760(VIA VT82C686/A/B)

VIA
KT266 - 600
K8T800(Pro)
Pro133(A/T)
Pro266
PT880Ultra
VN800
VX700

SiS
SiS645
SiS649
SiS651
SiS661
SiS662
SiS740
SiS746
SiS748
SiS756
SiS761GX

ULi
M1695[M1567]

I like that setup SetFSB: "SetFSB.exe / autoinc / step: 2 / period: 60"
SetFSB start, and every hour, FSB increase.

If my FSB set to 300MHz at H 0, it will be:
- 1 H: 302 MHz
- M 2: 304 MHz
- 3 H: 306 MHz
....
- 10 H: 320 MHz

Example, I want to increase my FSB automaticlly every 5 minutes by step of 10 MHz:
"SetFSB.exe / autoinc / step: 5 / period: 10"

In my examples, self SetFSB increase FSB but never stop alone. Maybe we need to add a last option:
"SetFSB.exe / autoinc / step: 2 / period: 60 / maxstep: 10"

maxstep: 10: Number of steps that SetFSB can do. SetFSB When do all steps, it stop the auto increment.
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  #3  
Old 27-06-2009
Omari's Avatar
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Join Date: May 2008
Posts: 626
Re: Increase FSB or CPU Multiplier

Command Line Switch Options SetFSB Version 2.0.b.20c has the following Command Line Switch Options.
-w [00-99]: Wait [sec] default = 10sec
-s [000-999]: Set FSB [MHz]
-i [00-99]: Increment [MHz] default = max
-u [00-99]: 0 (default) = normal, 1 = high
-b [0-1]: 0 (default) = normal, 1 = background

[/ H60]-h [00-99]: hold [min.]

-S300 / S300 This works both.
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  #4  
Old 27-06-2009
MattyBoy's Avatar
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Join Date: Sep 2005
Posts: 1,360
Re: Increase FSB or CPU Multiplier

CPU operation speed = FSB frequency x CPU multiplier , Users tweak their systems either by increasing FSB frequency or CPU multiplier, which is usually locked for the Pentium 4 CPU when purchased of the shelf, greatly limiting your overclocking options.I have a amd athlon xp 1800 Palomino core on a Giga-Byte 7DXR has a maximum FSB of 150 and a multiplier of up to 12.5 last I look up 12.5x150 = 1875 Mhz. Suppose I have a amd athlon 2100 or 2200 purchase this work according to me in 1770 and 1800 Mhz
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  #5  
Old 27-06-2009
Joshua's Avatar
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Join Date: Oct 2005
Posts: 1,139
Re: Increase FSB or CPU Multiplier

your motherboard has a maximum number of mHz stable turns. The multiplier is determined by the processor. So I get the maximum multiplier of 12.5 is not quite.

2100 + (1733) and 2200 + (1800) works both with 133 FSB so mp of 13 or 13.5. They are unlocked (= you can change the multiplier) so you can easily clock.
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