1333 FSB Mod, Confirmed To Be Working By Me.

[hollo]

hi guys, i don't really feel like drawing up every possible pad mod (between 133, 200, 266 and 333)

but knowing all the BSEL pad settings (L/low, or H/high) for each front side bus you just need to know how to change a pad from L to H, or H to L, and you should be able to do any modification you like so long as your motherboard supports the new front side bus, with the disclaimer that it doesn't seem to work on every motherboard.

the images i've attached are taken from these 2 data-sheets:
Core 2 Duo and Core 2 Duo Extreme Series Datasheet
Pentium D 800 Series Datasheet - this is the only datasheet i found that describes the BSEL pads as open-drain outputs that should be raised to Vtt
and a little information about open-drain outputs http://en.wikipedia.org/wiki/Open_drain

i should mention that i have never done this mod myself
but this is how i would do it
this method is not the method that was posted earlier in the thread, but i think if the mod can work on your motherboard this method will work:

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1) insulate the pad(s) that you want to change, perhaps with a little glue (superglue or epoxy), so it is totally isolated and can not interfere with the mod.

2) then, if you are modifying a pad from L to H, draw a trace over the insulated pad with a conductive material and connect it to a nearby Vtt pad.
and/or
2) if you are modifying a pad from H to L, draw a trace over the insulated pad with a conductive material and connect it to a nearby Vss pad.

a little tape can help with drawing the conductive trace, and probably also with applying glue if you decide to insulate the pad, eg:

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the mod should be easy to remove with anything that'll dissolve the glue or conductive material that you use, eg meths or isopropyl alcohol (or you could manually scrape it off with a razor or sandpaper if you need to).

a method of doing the mod without a conductive-ink pen that i considered was to use tin-foil, or solder squished to a thin sheet (it compresses very flat with any pair of pliers), carefully shaped to fit on the correct pads and insulated with a little double-sided or single-sided tape where necessary. i was making a shape to fit on a friend's pentium d 805 to mod it from 133mhz to 200mhz with squashed solder, and it seemed like it would work ok if it was done precisely, and would be really easy to remove or adjust (but i never finished it cos he got a new CPU).

in many cases people didn't need to use any insulation, a BSEL[H] pad could probably be substituted for a Vtt pad, and a BSEL[L] pad could probably be substituted for a Vss pad. but the above method ^ is what i would try if nothing else works.

people have mentioned that the mod does not work with gigabyte motherboards, but i would be interested to hear if anyone has tried this on a gigabyte motherboard using insulation + Vtt, instead of no insulation + Vcc.

hope this helps
post your successful and unsuccessful methods and hardware