1333 FSB Mod, Confirmed To Be Working By Me.

[__Miguel_]

i did the 1333 FSB mod on my e6300 last night. My board is ASUS P5B. My board got stuck in an endless cycle of reboot/shutdown before post/reboot etc. im using the 1605 bios, which is supposed to support 1333FSB cpu's. Removed the mod and it is working fine again. Not sure why its not working.

Your answer:

I've remembered something I wanted to tell earlier. It has already been said many times in this thread, but it's best to repeat once more: there are motherboards that can't be tricked into booting CPUs at different straps from the original ones. Gigabyte boards, for one, are a good example: they simply won't work with modded CPUs.

In short, most likely the motherboard doesnt' like modded CPUs, like the Gigabyte boards.

Modded CPUs are different from "upper-strap" CPUs: the first ones are asking for a strap they don't usually requiring. From what I've gathered (and I'm actually guessing from those findings), it seems some boards simply take the strap the CPU requests for granted, and boot acordingly (as most ASRock boards seem to do); others actually seem to compare requested strap with expected strap, and refuse to boot when those two values are different.

That is, for me, the most logical thing happening. Other options are some boards only acepting BSEL mods if they are "VTT mods" (see some posts earlier), but that has not been tested until now; or, of course, something being wrong with the BSEL mod itself.

Hope this helps.

Cheers.

Miguel