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FSB strap bios question

post #1 of 6
Thread Starter 
I know not every Asus board has this option.

Should I set the "fsb strap to north bridge" to a certain value(like 200mhz, 333mhz etc)?
Or should I just leave this option as default auto and begin my overclocking?
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post #2 of 6
You can leave it set at Auto.
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post #3 of 6
I would set the FSB strap to the lowest stable setting. If the motherboard jumps to the next strap then timings will relax, which will affect performance. I have found with the P5K series that it remains stable with the 333 strap to at about 450-455 bus.
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post #4 of 6
my .sig-rig is running at a 378MHz FSB with a 333MHz Strap and my DDR2-800 (400Mhz) is running a 1:1 FSB:RAM ratio by underclocking itself to 378Mhz.

This allows me to run my Q6600 @ 3.4GHz stable without having to effect the voltages of my NB (1.1v) or my RAM (1.8v). However, once I get up to a 400Mhz FSB I might have to change my strap to a 400Mhz strap to stay in a 1:1 ratio - if it will take it stable... sometimes running on a 333Mhz and overclocking your ram to keep up with the FSB can be more stable. :shrug: I might have talked myself into a circle.
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post #5 of 6
The rule of thumb is to choose the strap of the lowest speed that makes your RAM run stock or at a stable OC'ed speed (should only be like 1 strap setting above the one that gives stock speeds). Then the sky's the limit for OC'ing your CPU since you never have to worry about how your FSB is affecting your memory speed.
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post #6 of 6
Thread Starter 
Thanks for the explanation.

I've overclocked my e8200 to 3.0(8*375) from the starting 2.66(8*333).
So should I set the FSB strap to 333mhz or just leave it as Auto?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8300  asus p5k pro 8800GT 512MB 2X Transcend 1GB DDR2 800 
Hard DriveOSMonitorPower
WD raptor 74GB XP pro 32bit CMV CT-72 17' Thermaltake 420W 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8300  asus p5k pro 8800GT 512MB 2X Transcend 1GB DDR2 800 
Hard DriveOSMonitorPower
WD raptor 74GB XP pro 32bit CMV CT-72 17' Thermaltake 420W 
  hide details  
Reply
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