geoffrey

Voltmodded it few months back for fellow overclocker Benwake.

Some pictures:










Got another one incoming, ready for voltage modifications actions. This one is from Netherlands, will be traveling back this week all ready. I'll get some pictures and provide a clear shot of how to modify these boards Coolest thing would be to design my own bench unit which replaces CPU core voltage regulator module on elder mainboards.

Massman

Very cool ... close to awesome

Do you have time to check out my K6/2 mainboard?

geoffrey

Sure, although that a PLL mod would really boost oc-range right?

Massman

Well, I need a way to go beyond 120MHz fsb OR have a higher multiplier

geoffrey

ISL6524 regulator



Pin 21 is the feedback pin, pin 22 is Vcore check.
I desoldered pin 21 and 22 and put them together. I also soldered a 50k VR between Vcore readout and ground, the middle point of the VR is connected to pin 21 & 22. Benwake, I believe I did not connect pins 21 & 22 on your board and everything seem to work wonderfully well, but that is because we only tried without CPU if I remember that right. Without this trick your board will probable only overvolt few percent when you put in your CPU. Come on over when you have the time, oh and please, hook me up with the datasheet of your socket 7 board, I'm quite sure the trick can be done for both boards. Finally spend some time with exploring the circuit

Result:


Celeron 800 running at 2V. I went as high as 2,2V, no problems with that it seems.

Attached Thumbnails

Gamer

I just pinmodded the PIII's for 2.05v

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geoffrey

K, afterwards bring them to me, I give them the juice they need

Board has more tweaking options, have to find the time to work them out and see what good they are. Saw some interesting links of P3 boards reaching 250MHz Front Side Bus few weeks back, I'd say that is a nice goal to aim for.

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Massman

250FSB

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DDC

Heey, my board :P.

Its back home now. Inmediadly, i put a 550Piii and 800Piii under it and, Yes to record in cpu-z with it.

Also I repleased some cooling:
timkonings.ti.funpic.org/HWBot/Foto's/PICT0442.JPG

New chipset cooler, FET cooler and a ICS cooler. Already run it all the way to 2,5 volt with a Tualatin under it, no problem. Doesn't get hotter than 30c

Heb trouwens ook al de 200FSB gehaalt met de 800MHz piii

(Ik maak het geld morgen over trouwens :P)

geoffrey

Insane! Don't forget to contribute your scores to the Madshrimps overclocking team: http://www.hwbot.org/profile.team.do?teamId=1433

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