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How to set Front side bus?

skydiver

By skydiver,
in OSx86 10.4 (Tiger)

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KasperNL
KasperNL
Posted
Posted

you should edit boot.plist.. this is located:

/Library/Preferences/SystemConfiguration/com.apple.Boot.plist

 

My overcloked FSB is running on 355, your boot.plist should look like this:

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Kernel</key>
	<string>mach_kernel</string>
	<key>Kernel Flags</key>
	<string></string>
	<key>Boot Graphics</key>
	<string>Yes</string>
	<key>Kernel Flags</key>
	<string>fsb=355</string>
</dict>
</plist>

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KasperNL
KasperNL
Posted
Posted
So if you overclock, you have to edit settings in osx, too? I've got mine from 200 to 240 without any setting changes and it runs really stable.

 

Some kernels do not detect the FSB correct...

 

Simply check if the 'About this Mac' dialog displays the correct CPU speed. If so there's no need to edit the boot.plist

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britt
britt
Posted
Posted

hi i was wondering about the fsb also, my specsheet says my fsb is 533mhz, but my about this mac says it is

 

 

 

Machine Name: Apple Development Platform

Machine Model: ADP2,1

Processor Name: Intel Core Duo

Processor Speed: 2.6 GHz

Number Of Processors: 1

Total Number Of Cores: 2

L2 Cache (per processor): 2 MB

Memory: 2 GB

Bus Speed: 200 MHz

 

 

also the processor speed is wrong ? it should be 1.73ghz ?

what do i need to do to fix this ?

and will this make any diff to my issues with dvd playback being jumpy and the clock running very slow ??

many thanks for any help you can give on this ??

i am running native install:

10.4.8, updatwd tp 10.4.9, with kernal 8.9.1 ??

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KasperNL
KasperNL
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Posted

Which 8.9.1 kernel are you using? If Mac OS X is thinking your FSB is different from what it really is, it can have serveral timing ussues which you can experience in stuttering audio and video.. DVD Playback, Games running very slow or very fast. etc.

 

You can see the exact kernel version by typing (in the Terminal.app):

uname -a

 

As written I would like to advice the most recent NetKas kernel..

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preskush
preskush
Posted
Posted

Interesting... my about this mac displays the correct overclocked speed, 2.21GHz (FSB clocked from 200 to 240MHz), but my system profiler tells me this:

 

Machine Name: Mac

Machine Model: ACPI

CPU Type: Dual Core AMD Opteron Processor 165

Number Of CPUs: 1

CPU Speed: 2.21 GHz

L2 Cache (per CPU): 1 MB

CPU Features: FPU VME DE PSE TSC MSR PAE MCE CX8 APIC SEP MTRR PGE MCA CMOV PAT PSE36 CLFSH MMX FXSR SSE SSE2 HTT SSE3

Memory: 3 GB

Bus Speed: 388 MHz

 

I'm running Tubgirl's 10.4.8 Nebuchandezar 8.8.1 kernel for AMD with a nF4 motherboard. Everything runs pretty smooth and the other info in the profiler is good, except for this one point. Any ideas on what could be going on?

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britt
britt
Posted
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Which 8.9.1 kernel are you using? If Mac OS X is thinking your FSB is different from what it really is, it can have serveral timing ussues which you can experience in stuttering audio and video.. DVD Playback, Games running very slow or very fast. etc.

 

You can see the exact kernel version by typing (in the Terminal.app):

uname -a

 

As written I would like to advice the most recent NetKas kernel..

 

hi there this is what comes up after i type in the above :

darwin roy-cross-computer.local 8.9.1 Darwin Kernal Version 8.9.1 : thu mar 25 20:55:00 pst 2007;netkas: 792.18.15~1/RELEASE_I386 i386 i386

 

is this the latest version ? if not can you point me in the right direction to what i need ?

and how i replace it ? as i am a total newbie at this and have never replaced a kernal before ??

many thanks

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Bruce Wang
Bruce Wang
Posted
Posted

No. The latest one should look like below:

Darwin bruce-wangs-computer.local 8.9.1 Darwin Kernel Version 8.9.1: Thu Apr 19 11:20:37 UZT 2007; ToH:xnu-792.18.15/BUILD/obj/RELEASE_I386 i386 i386

 

The latest kernel is available on IRC channel #1049 @irc.osx86.hu. Be aware, the latest kernel doesn't need r3d3.kext nor dsmos.kext and doesn't need to set FSB. Below is how to replace it:

1. Get the kernel

2. Rename the new kernel to mach_kernel.base and place it at root

3. Backup your current kernel, type in Terminal:

cp /mach_kernel /mach_kernel.old

3. Type below in Terminal:

sudo chown root:wheel /mach_kernel.base

sudo chmod 644 /mach_kernel.base

cp /mach_kernel.base /mach_kernel

4. Reboot

 

Remember to uninstall r3d3.kext or dsmos.kext.

 

Bruce

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Sabr
Sabr
Posted
Posted
Remember to uninstall r3d3.kext or dsmos.kext.

 

To do that, browse to /System/Library/Extensions, find the file r3d3.kext or dsmos.kext (whichever one you were using) and drag them to the trash. Then go up one folder, to /System/Library and delete two files called Extensions.kextcache and Extensions.mkext.

 

Then reboot :)

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britt
britt
Posted
Posted
No. The latest one should look like below:

Darwin bruce-wangs-computer.local 8.9.1 Darwin Kernel Version 8.9.1: Thu Apr 19 11:20:37 UZT 2007; ToH:xnu-792.18.15/BUILD/obj/RELEASE_I386 i386 i386

 

The latest kernel is available on IRC channel #1049 @irc.osx86.hu. Be aware, the latest kernel doesn't need r3d3.kext nor dsmos.kext and doesn't need to set FSB. Below is how to replace it:

1. Get the kernel

2. Rename the new kernel to mach_kernel.base and place it at root

3. Backup your current kernel, type in Terminal:

cp /mach_kernel /mach_kernel.old

3. Type below in Terminal:

sudo chown root:wheel /mach_kernel.base

sudo chmod 644 /mach_kernel.base

cp /mach_kernel.base /mach_kernel

4. Reboot

 

Remember to uninstall r3d3.kext or dsmos.kext.

 

Bruce

 

ok i said i am an idiot ??

i dont know what you mean in #2 ? place at root ?? where is that ?

also where can i get the kernal ??

i tried to find the irc channel but no luck ?

and do i need to uninsta;; the rd3.kext ect before i reboot or after ?

thanks again ?

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KasperNL
KasperNL
Posted
Posted
ok i said i am an idiot ??

i dont know what you mean in #2 ? place at root ?? where is that ?

also where can i get the kernal ??

i tried to find the irc channel but no luck ?

and do i need to uninsta;; the rd3.kext ect before i reboot or after ?

thanks again ?

 

Britt,

 

The most recent kernel can indeed be found on the IRC channel. Today they released a new version with speedstep support.

 

the r3d3.kext extensions are not required anymore since this kernel is unencrypted.

 

The Root is the lowest directory of your file-system (also known as: /), in the OS X GUI this is shown when you open the harddisk you boot from. In the Terminal you can go to the root by typing:

 

cd /

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britt
britt
Posted
Posted

hey thanks for getting back to me ?

sorry but i am still confused in the directions given it says "2. Rename the new kernel to mach_kernel.base and place it at root"

this is what confuses me ? do i just type it or do i need to move the file somewhere ??

also i have tried the " irc channels but cannot find them ?

what and where are they ??

or is that just another name for the discussion forums ??

could you post a link to the one i need ?

sorry to be a pain, but i am a total newby at this ?

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britt
britt
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Posted

ok just downloaded the latest kernel and ran the install as above but before reeboot i got :"permission denied" ??

so i didnt remove the files r3d3.kext ?

and my kernel still shows up as the same ?

what do i do now ?

anyone ??

thanks

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britt
britt
Posted
Posted

1. Get the kernel

2. Rename the new kernel to mach_kernel.base and place it at root

3. Backup your current kernel, type in Terminal:

cp /mach_kernel /mach_kernel.old

3. Type below in Terminal:

sudo chown root:wheel /mach_kernel.base

sudo chmod 644 /mach_kernel.base

cp /mach_kernel.base /mach_kernel

it was after typing all of the above and then pressing enter that i got the permission denied ?

tried again and got same thing ??

 

also should i remove the r3d3 kext before i reboot or after ??

thanks again

 

 

 

 

 

on the command that got permission denied type in sudo -s press enter and enter your password then type in the command
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britt
britt
Posted
Posted

1. Get the kernel

2. Rename the new kernel to mach_kernel.base and place it at root

3. Backup your current kernel, type in Terminal:

cp /mach_kernel /mach_kernel.old

3. Type below in Terminal:

sudo chown root:wheel /mach_kernel.base

sudo chmod 644 /mach_kernel.base

cp /mach_kernel.base /mach_kernel

it was after typing all of the above and then pressing enter that i got the permission denied ?

tried again and got same thing ??

 

also should i remove the r3d3 kext before i reboot or after ??

thanks again

 

 

ok update 2 i maneged to run the kernel replacement above ? then removed the r3d3? and other files mentioned,

rebooted,repared the permissions with disk util rebooted and now?

i just get stuck on the grey screen with the apple and spinning circle ??

help what do i do now ???

 

thanks in advance for any help that you can provide ?

britt

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