DiaboliK Posted October 29, 2006 Share Posted October 29, 2006 heres a small chart i found now that our community needs it: Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/ Share on other sites More sharing options...
Guest bikedude880 Posted October 29, 2006 Share Posted October 29, 2006 Good find! I'm suer this will help alot of people when it comes to selecting a FSB value to pass to the kernel (unless they've OC'd, like me ) Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-219015 Share on other sites More sharing options...
DiaboliK Posted October 29, 2006 Author Share Posted October 29, 2006 yea i knew it would be very handy for some (if not all) of the n00bs. by the looks of the woodcrest FSB and the MacPro has 2 of them no wonder they blow everything outta the water! Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-219019 Share on other sites More sharing options...
Canglan Posted October 31, 2006 Share Posted October 31, 2006 I have a Core 2 Duo T7200 (2.0Ghz), should I use 200Mhz or 266Mhz? Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220643 Share on other sites More sharing options...
DaemonES Posted October 31, 2006 Share Posted October 31, 2006 Canglan you can use mifki's kernel with fsb autodetection: http://forum.insanelymac.com/index.php?showtopic=31456 Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220788 Share on other sites More sharing options...
Bearcat Posted October 31, 2006 Share Posted October 31, 2006 I have a Core 2 Duo T7200 (2.0Ghz), should I use 200Mhz or 266Mhz? T7200 is a Merom processor with a 667mhz quad pumped bus, so your bus speed should be 667/4 = 166 Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220790 Share on other sites More sharing options...
Kaspers Posted October 31, 2006 Share Posted October 31, 2006 Does OSX sets the FSB speed by himself ? I thought the only way to do this, is in the bios... And how do you set the FSB speed in the terminal ? Whats the default setting ? (10.4.8 kernel) Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220808 Share on other sites More sharing options...
Bearcat Posted October 31, 2006 Share Posted October 31, 2006 Does OSX sets the FSB speed by himself ?I thought the only way to do this, is in the bios... And how do you set the FSB speed in the terminal ? Whats the default setting ? (10.4.8 kernel) You set the fsb in the BIOS, but OSX needs to know to set the clocks correctly. There are 2 kernels and each have their own way of setting this, check the other threads on how to do this. There is development going on to try and determine this automatically, but the current default (I believe) is 200mhz, which is good for Pentium 4 (later models) and Pentium D processors, which run on a 800mhz bus. You do not set this in terminal, you use a boot argument when the system is booting, again in the other threads about the kernels. Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220816 Share on other sites More sharing options...
Rammjet Posted October 31, 2006 Share Posted October 31, 2006 To determine your FSB, open System Profiler. On the first page you see "Bus Speed". Divide that number by 4 to get the FSB value. Bus Speed / 4 = FSB for kernel (round this to nearest whole number) At boot, hit F8 and enter: fsb=200 or whatever value that you calculate. In your boot.plist add: <key>Kernel Flags</key> <string>fsb=200</string> Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220821 Share on other sites More sharing options...
Bearcat Posted October 31, 2006 Share Posted October 31, 2006 Thanks Rammjet That's for the Vitaliy kernel, the semthex kernel uses different paramters Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220895 Share on other sites More sharing options...
Kaspers Posted October 31, 2006 Share Posted October 31, 2006 Thanks for the explaning ! My CPU is a Core 2 Duo E6600 running @ 3.00 GHz (OC'ed) So my bus speed is 333 ? (3000 / 9 = 333,3) Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220940 Share on other sites More sharing options...
Careless Posted October 31, 2006 Share Posted October 31, 2006 Well, my Opteron 165 is overclocked to 283 x 9, so shall i set my speed to 283? Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-220967 Share on other sites More sharing options...
Rammjet Posted October 31, 2006 Share Posted October 31, 2006 Thanks for the explaning ! My CPU is a Core 2 Duo E6600 running @ 3.00 GHz (OC'ed) So my bus speed is 333 ? (3000 / 9 = 333,3) 3 GHz is your processor speed, not your bus speed. I told you to get the correct value from System Profiler -> Hardware -> bus speed. Then I said divide that bus speed by 4 not by 9 You thanked me for explaining but you didn't read a word I said! If for some reason you can't get the bus speed from System Profiler, go to Windows and download PC Wizard. Click on the Mainboard icon -> Chipset -> FSB Frequency. This is the FSB value already divided out for you. Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-221040 Share on other sites More sharing options...
Kaspers Posted October 31, 2006 Share Posted October 31, 2006 Did you read my question ? I said: So my bus speed is 333 ? (3000 / 9 = 333,3) I never said that my bus speed is 3 GHz... Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-221046 Share on other sites More sharing options...
VacTacks11 Posted October 31, 2006 Share Posted October 31, 2006 For people running Intel Core 2 Duo 'Conroe' E6400, E6600, E6700, X6800 processors: To help reduce bottlenecks, the front side bus has been increased to 1066MHz from the 800MHz that all but a few of the Extreme Edition processors used. This is at a base frequency of 266MHz, quad pumped. Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-221056 Share on other sites More sharing options...
Kaspers Posted October 31, 2006 Share Posted October 31, 2006 So what do you want to say with this ? Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-221101 Share on other sites More sharing options...
joe75 Posted October 31, 2006 Share Posted October 31, 2006 You thanked me for explaining but you didn't read a word I said! Rammjet, its things like that, that make you "da man" Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-221115 Share on other sites More sharing options...
Bearcat Posted October 31, 2006 Share Posted October 31, 2006 Go to the Intel web site here: http://www.intel.com/products/processor_number/index.htm Click the tab "View Processor Number Details" Find your processor, for E6600, look under Core Processors, then select Core 2 Duo Processors. Scroll down the list to find E6600, and note the "Front Side Bus" at 1066. Divide 1066 by 4 and get 266. 266 is the number you supply to Vitaliy's kernel as fsb=266 as a boot argument. IMPORTANT: You need to find your processor, as Intel processors of late have Front Side Bus ratings of 400, 533, 667, 800, 1066, and 1333. For the Math challenged: 400/4 = 100 533/4 = 133 667/4 = 166 800/4 = 200 1066/4 = 266 1333/4 = 333 cheers, Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-221127 Share on other sites More sharing options...
Kaspers Posted October 31, 2006 Share Posted October 31, 2006 Go to the Intel web site here: 266 is the number you supply to Vitaliy's kernel as fsb=266 as a boot argument. How to I manage that ? Pressing F8 upon boot doesn't show up a command line... Link to comment https://www.insanelymac.com/forum/topic/31471-fsb-speed-chart/#findComment-221130 Share on other sites More sharing options...
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