478 mod help please

[kikicoco1334]

i just wipped out my old 478 board and about 10 of those chips :D
i been overclocking but the thing is that my board dosn't have any kind of voltage options...
my board is a Biostar P4M900-M4 i don't really want get a new board because simply it has DDR2-support..

i been looking around internet and seems like i just can't find anything about vmod for 478 motherboards...
and i already tried the mod in my attachment and the and dosn't seem to work at all...
i don't know why...

it boots and all that... but no voltage will not change at all... it stays in 1.5V
maybe i am doing it wrong...
i have the Northwood Pentium 4 3.0GHz FSB 200 x15 L2-512KB

[ocgmj]

If you can take some pictures of the IC chips around the cpu socket and list the numbers on top of the chips maybe I can help you out.

[ocgmj]

I found this pic on the web. Get me the numbers off these chips and I will see what I can do.
1691

[kikicoco1334]

http://www.overclockaholics.com/forums/attachment.php?attachmentid=1691&thumb=1&d=1267775158
the top is
AZ324M-E1
721N60

and the other one is
ISL6566
CRZ
H740BX5

THANK YOU!

[ocgmj]

Bottom chip in the picture.
Here is your datasheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/120251/INTERSIL/ISL6566.html

Pin 9 to ground. Do you have all the proper equipment to vmod?

[kikicoco1334]

Bottom chip in the picture.
Here is your datasheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/120251/INTERSIL/ISL6566.html

Pin 9 to ground. Do you have all the proper equipment to vmod?

Pin 9 = FS?
solder that to the grounding point?!:blink:
the chip is a little too small
what are the proper equipments?
i have never done a vmod before this is my fist

[Splave]

I would just send it to OC :) he has the epic solder station of the FUTURE....Future.......future !!

EDIT: and he is great at it!

[FACE]

Yeah, if this is your first mod I would recommend having a backup board or sending it to someone. This one takes a seasoned hand, small tip and skinny solder.

It's really easy to bridge the points on that chip. Be careful! :ohcrap:

[ocgmj]

If you don't have the proper equipment for modding I would HIGHLY recommend you not do it. If you would like me to do for just let me know.

[kikicoco1334]

thank you so much for the offer, but i have say no to that...
people here are too nice to me, i am not the best overclocker in here, even with the vmod i don't think i can became first place, i don't want to waste other people's time
it is already kind enough that you guys help me all this time help me looking around and find all the answer that i needed =)
i will order some new solder tip and try do it myself

but really thank you for the offer!

[ocgmj]

Good luck man. Do yourself a favor and read this thread a few times. http://www.overclockaholics.com/forums/showthread.php?t=698&highlight=volt

[kikicoco1334]

Good luck man. Do yourself a favor and read this thread a few times. http://www.overclockaholics.com/forums/showthread.php?t=698&highlight=volt

thank you so much man.
i am really out of words for thanking people that's in here
i am blaming on english is not my first language

[kikicoco1334]

hey ocgmj just a quick thing we are moding the pin 9 to grounding?
just solder pin 9 to screw hole right?

[ocgmj]

First thing you need to do is get an ohms reading from pin 9 to ground using a DMM(Digital Multi Meter) Now take that value lets says it's 2K ohms multiply it by 20 which will give you 40k. If I was a betting man I would say you are probably going to need a 50k VR (Variable Resistor). Turn the screw on the VR clockwise to you hear it clicking then hook your DMM to the VR and make sure it's at maximum value (close or more than 50K) If you close to 0 then turn the screw other way and re-measure. Now solder a wire from pin 9 to middle leg of VR. Then solder a wire from third leg of VR to ground i.e. screw hole or equivalent. This is why I asked in the beginning if you had all the proper equipment. ;)