BSEL pad/pin mod 775 cpu

[dpk33]

came across this recently and it piqued my interest and i figured i have nothing to lose by tinkering around with a few old 775 duos and quads on oem motherboards. anyway, i'm aiming to get a q6600 and e7200 from 266/1066 -> 333/1333 or maybe even 400/1600.

how would i go about finding out if an oem motherboard can support the 400/1600 fsb setting? one is an intel branded G31 and the other is an Acer WG43m. i haven't seen a single chipset (besides x48 and some p45 boards) that "officially" supports 1600 fsb.


also, i've seen many variations of this mod, but i'm not sure which one to attempt. referring to the image below, these variations range from:

1. covering only bsel 2 with tape (q6600 -> 333/1333)
http://www.tomshardware.com/answers/id-2125877/tape-mod-bsel-mod-intel-q6600.html

2. covering bsel 2 AND closer VCC with tape (q6600 -> 333/1333)
http://alumar.hubpages.com/hub/Get-more-from-your-Quad-Core-Q6600

3. connecting bsel 2 to closer VCC (any 266/1066 -> 333/1333)
http://www.overclockers.com/intel-lga775-pad-modding/

4. covering bsel 2 AND bsel 1 (E8xxx/Q9xx0-> 400/1600)
http://www.xtremesystems.org/forums/showthread.php?232678-E8xxx-Q9xx0-FSB-1600-pin-mod

i'm hoping someone can weigh in with an explanation and/or the pros and cons of each option. my understanding is that taping off/connecting bsel to vcc or vss changes the bsel combinations. i'd much rather tape off one or two of the pins than attempt a mod with conductive paint (just seems more dangerous). and should i go out to get electrical tape or would scotch/masking tape be fine for this purpose?

 

[sm625]

I would use a polyimide film type tape. Absent that, use thick clear packing tape. The pins would probably penetrate your typical scotch tape or electrical tape.

 

[Hi-Fi Man]

You're not going to find a chipset that "officially" supports a 1600MT/s FSB except X48. That being said you don't need a board that advertises support for a 1600MT/s FSB to run one at that speed so it's just a process of trial and error.

 

[Gonad the Barbarian]

I did method 1 on an HP IPIBL-LA and q6600. The POST screen throws up a nag about the bus speed not being supported but it's running at 333Mhz. I used that thicker type of clear and smooth packing tape.

 

[dpk33]

Can anyone explain to me the rationale behind method #2? is covering the VCC in addition to BSEL 2 supposed to do anything different?

and I'm interested in trying the 400fsb too - but if I do end up doing that, how should I go about maintaining stability? I'm not confident that a Q6600 can do 3.6ghz on stock volts.

 

[Gonad the Barbarian]

I tried to find more info before I did mine as well but couldn't either. I assume method 1 disables 266Mhz on the motherboard and forces it to default to 333Mhz judging from the error I get, and method 2 makes the CPU look like an actual 333Mhz part, but I'm sure not curious enough to experiment with it when the easiest method got it where I wanted it to be. Getting to 3.6Ghz on stock volts is a real longshot, not sure what you can do for that.