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P5B - Power On, Power Off, Power On Again Theory

post #1 of 16
Thread Starter 
All,

I would suspect that most people who overclock the P5B have experienced the following:

Hit the power button, the system powers up, then powers down (Well I don't think it powers down completely), pauses for a second, then powers up again and boots without a hitch.

The question is why is it doing this?

The only thing that I can think of is that ASUS has put a fail safe on the FSB setting in the BIOS in order to recover from any type of overclock failure or success. If the board is powered down in ANY WAY (Even after a good overclock), the FSB is set back to 266 MHz. This way, when you hit the power button it reads the FSB value in the BIOS, compares it to the board setting, changes it to the set BIOS value, powers down and restarts with the corrected FSB speed.

I am thinking this way because of the different straps and the latency settings associated with them.

Any other thoughts?
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post #2 of 16
All P5B Deluxe does that, there are no solution for this............yet
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post #3 of 16
When the RAM speed is different than the stock speed the bios has to do something to calibrate, and then does a full power on. It's weird. I am trying to find out exactly...
post #4 of 16
Thread Starter 
Quote:
Originally Posted by Mikey122687
All P5B Deluxe does that, there are no solution for this............yet
I did not pose this as a problem...

Was just trying to think like the Motherboard...

It's more of a curiosity...
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post #5 of 16
Thread Starter 
Quote:
Originally Posted by RyGuy
When the RAM speed is different than the stock speed the bios has to do something to calibrate, and then does a full power on. It's weird. I am trying to find out exactly...
You talking about the straps?
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post #6 of 16
Quote:
If the memory setting is not the chipset spec of 800/ 667/533 MHz in the BIOS setting during system installation, then the system will re-write the initial motherboard parameter when the first boot after BIOS seeting. After the re-write is done, the system will reboot. The shutdown and reboot after the first power on is normal situation.
This is for the Gigabyte DS3 but same situation. Same Chipset.
post #7 of 16
This is my overclocking experience with my P5B Deluxe: http://www.overclock.net/intel-mothe...rs_reboot.html

Now, it's gone.
post #8 of 16
Thread Starter 
Quote:
Originally Posted by RyGuy
This is for the Gigabyte DS3 but same situation. Same Chipset.
Let me know if you find anything out...It just doesn't make any sense to me why a memory setting would do this....
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post #9 of 16
It should only do the power on/off/on after each time you change the RAM speed (FSB).
Quote:
Originally Posted by mtuccio
Let me know if you find anything out...It just doesn't make any sense to me why a memory setting would do this....
That's it, did you read the quote?
post #10 of 16
Quote:
Originally Posted by Nasgul
This is my overclocking experience with my P5B Deluxe: http://www.overclock.net/intel-mothe...rs_reboot.html

Now, it's gone.
ya i saw your thread over @ XS, but i don't want to lose performance from 500FSB down to 333FSB. Also i have an E6400 so running @ 8x multi is bad. I rather have the double reboot than to lose SuperPI 1MB time
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