anyone done succesfull vcore mod on P4P800-e DLX???

[muzwa kai]

ive been trying to find a vcore mod for the P4P800-e dlx, but found no confirmation that it has been done on this board. it seems to be a VR between pin 8 (fb) and ground on the adp3180 IC. i have tried this, but reducing the resistance does nothing, and ends up blanking the screen.
i need it for my prescott 3.2 which wont boot above 1.6v.

edit: what resistance would the VR be set at for increased volts?

mk :confused:

[-=j0nnyr0773n=-]

Check out this thread, this is what I did mine from.

http://www.xtremesystems.org/forums/showthread.php?t=39170&highlight=p4p800-e+deluxe+droop

Go down to post 25 for a pic of vcore and vdimm mods. Post a pic of this section of your mobo if you want to and I can show you the points. Also, isn't 1.6v a little much for a pressy?

-=j0nnyr0773n=-

[muzwa kai]

that seems to be the vdroop and vdimm mods. im after the vcore mod which removes the maximum limit of 1.6v for the prescott cpu.
also my prescott seems fine at that voltage. its watercooled so it wont be burning up. its maximum temps i have seen are about 42c, with the heater on in my room. generally before water it was maxing out at about 70c, with no problems.

mk

[-=j0nnyr0773n=-]

Aaah, yess the vcore mod. I did actually see that somewhere the otherday, I may have bookmarked it, I'll check and see if I can find it. I think there were 2 ways 2 do it, one was on the back of the board and the other was on the front for the same mod. I'll look around. :)

About the 1.6v level I have been asking around for safe max vcore for 3.0E D0 Prescott and have been hearing that even if you can keep the heat down (which you can) that so much voltage will seriously reduce the life, but I don't have anything to base that on, it's just what I hear. I am on air and would like to run a higher vcore myself, I'm scared to go past 1.55, but I would sure like to see some sort of proof that it's ok.

-=j0nnyr0773n=-

[-=j0nnyr0773n=-]

I don't have the link, but I also just randomly came across a post from malves saying that the P5P800 has the same chip as the P4C and the vcore mod is the same... If that helps..

-=j0nnyr0773n=-

[lalPOOO]

If you are planning to run more then 1.6v through your prescott, ESPECCIALLY on water, you MUST cool the mosfets. If you don't, expect a dead board.

[muzwa kai]

thanks for your help johnny..

ahhhh... i see lalpooo. i was actually wondering about that, but havent posted the question. i was thinking just simple ramsinks on the mosfets, but have read that a fan is good too. can the hot mosfets cause system instability, or do they just eventually die??? i practically burnt my finger on them, very hot.. i see about 10 of them. 9 on one side of the cpu socket and 1 on the other. im guessing they would all operate the same, needing to cool them all.

by the way, ive always wanted to post these smilies, so here they are...

:banana: :banana: :banana: :banana: :banana: :banana: :banana:

[-=j0nnyr0773n=-]

There's 9 on the left like you said and there's 1 on the right There's only six on the left on a regular p4p800). There's also a larger sized chip on the left side down below the others that I've seen people sink. I'm working on doing this myself, also the mosfets over by the memory too. I don't think I can get the one on the left though, cuz my vid card covers it up.

-=j0nnyr0773n=-

[muzwa kai]

yeah it looks like that will be my next move, to sink all the mosfets. seems like id better do that before i get to the actual vcore mod. thanks for the info people.... :clap:

[-=j0nnyr0773n=-]

Hey, I just cut up an old heatsink I pulled off a motherboard in a computer I saw on the side of the road with some other junked machines and chairs, furniture, etc.. Around here people like to throw their old furniture and electronics in a pile on the side of the road, anyways. I sinked the mosfets and took some pics, I have attached them also for viewing :) There's 9 on the left and 1 larger 1 down below. I also sinked 3 of them below the mem since I am sending 3.13v to the mem now. I also did the one to the right of the cpu, but it's not in the pic. The group of 9 get extremely hot, I mean I can't even lay a finger on them for more than 2 seconds MAX, more like 1 second tho. The ones by the mem don't get that hot, so that's good.

-=j0nnyr0773n=-

[muzwa kai]

looks good. im probably gonna just use ramsinks with thermal tape. i dunno when, but before i get more than 1.6v.

mk